I just finished skating around that infamous "cannot load main class start" thing, and I got blindsided with a sea of errors:
A friend suggests it might have something to do with com.google, but ultimately can't help me.
I haven't made a single alteration to any of the code so far. Eclipse just started up not being able to run and stayed that way. I think there's a way to fix it but it would require making acute changes at the sight of every single error; work that could be wiped by a cleanup if I'm proved wrong.
Anyone have a clue what the issue is? Thank you for the trouble.
UPDATE: Adding guava as a library relieved the error involving com.google, but threw in a handful of others. This one class file contains 3 of the most common unresolved types I've seen scattered throughout: Logger/LogManagaer, PropertyMap, and CrashReport
Your general problems revolve around not having dependencies in the build path. Eclipse's error messages are pretty clear about this; e.g. if a package name is underlined in red and can't be found, then that means it can't be found, and the obvious solution is to add the library that provides it, so that it can be found.
In virtually all cases here, a Google search for the missing packages and classes will lead you to the packages that contain it.
For each unresolved dependency, find the library, add it to the build path, then move on.
I also suggest consulting the documentation that comes with the source code you are attempting to compile, which often simply lists the dependencies, thus saving you the trouble of hunting them down as you go.
While we could do the internet searches for you and hash this out one step at a time, it's both better and faster for you to do it yourself. Better because if you're messing around with Minecraft source, having at least a basic knowledge of how your tools work is going to help you (I also suggest some of the material at http://docs.oracle.com/javase/tutorial/). Faster because the turnaround time of typing package names into the Google search box is a heck of a lot faster than constantly updating your question here and waiting for replies.
It looks like you are missing the Google Collections package, which now is called Guava.
Download the jar file, and add it as a library.
Related
I'm trying to update a software system to JDK-11 using modules, and everything was going just fine right up until I slammed head-on into the aforementioned issue.
I have a legacy signed JAR that I need to incorporate for interaction with legacy systems. There's no way to update the JAR and no way to get a new version. The JAR must be signed in order to be usable (the whole "trusted code" deal and whatnot). The problem is that the JAR contains classes in the unnamed (root) package. Yeah. Stupid. Bad practice. Blablabla. It's still there, and I still need to use it.
I've not found any documentation or answers anywhere that would remotely suggest that what I need is possible. In fact, the opposite is true: everyone is adamant that in the "new"(ish) module system, no class may reside in the unnamed package.
Needless to say I'm unable to both modify the contents of the JAR, or get at the sources to render a new one - that's without even considering the issue of the signature...
That said: I refuse to believe the folks at Oracle would leave such a glaring oversight with regards to legacy code. As we all know, a lot of the time we have no choice but to use it for legitimate reasons, and we can't do anything to fix/update/refactor/etc... I would have hoped there was a mechanism added to the module system to support this, albeit for extreme cases only, etc...etc...
Disclaimer: I do fully understand why this isn't meant to be supported. What I'm having a hard time with is the lack of a workaround...
Thanks!
I've already tried:
creating a facade module that transitively adds the offending module (obviously no dice, same problem)
unpacking-and-repacking the module while temporarily disabling signature validation in a test env (fails because the class is apparently referenced within many other, properly-organized classes)
finding an updated module (no luck here, either)
beheading a chicken and roasting it over a pentagram while invoking the aid of ancient pagan gods (tasty, but didn't fix it)
curling up in a ball under my desk and weeping until execution succeeds (that's where I'm typing this from)...
New to VisualStudio 2015, but not to programming. Have searched both Google and here for a lead on this, but considering the available search terms, I might not immediately uncover them.
I was looking into porting an old VB6 (200k+ LoC) to VB.Net in VS2015. Mostly just poking around to determine viability. Using a project converter, and have resolved most of the initial errors, and am familiar with how the Error List works.
However, it is throwing a new one at me. It now only has two lines of error, both showing the same thing. They both say:
" & ErrorName
That's a Quote, Ampersand, and ErrorName. That's all that show up on the error list line. No file. No line number. Double click on them does nothing.
I thought perhaps the project was corrupted, so I completely re-created it, adding all the modules, forms, classes, etc again, and it found a lot more errors to fix, which I fixed, and now these two lines show up again.
Does anyone have any indication where this is coming from, or, better yet, how to fix?
I've seen VB programmers report this misbehavior before, never with a good lead to explain the problem. It is specific to VS2015, the Roslyn integration caused many issues. In general a very buggy release, be sure to apply all available Updates, currently up to Update 3. If you have a license that includes an MSDN subscription then I recommend you install VS2012, the last "good" version of VS that was not yet affected by Microsoft's new focus on agile development.
I think the underlying issue is caused by the IDE simply not parsing the compiler error message correctly. Probably having to do with the statement with the error getting quoted in the message. Getting only part of the statement text and it fumbling quotes is a pretty good hint that this is where it went wrong.
So look at the actual output of the compiler, decent odds you'll now see the full error text. Use Tools > Options > Project and Solutions > Build and Run. Change the "MSBuild output build output verbosity" setting to Normal. After the failed build, use View > Output to see the compiler output. You'll probably have a lot of messages, consider copy/pasting the content.
So, there is this cool package I've found but it leaves a lot to be desired. Since it made more sense to modify it, rather than build a new one myself, I changed the code in the corresponding source directory (C:\Users[my username].julia\v0.4[package name]\src). I made sure to modify not just the base.jl file, but also the [name of package].jl one so that there are no issues with dependencies or the new functions I added. I tried running the package several times to ensure that Julia doesn't spit out any errors or exceptions (the original package had some deprecated stuff, which I also remedied). Still, I fail to use the additional functionality of the package that I augmented. Any help would be greatly appreciated.
I'm using Julia ver 0.4.2, on a Windows 7 machine. As an IDE I use Notepad++. Thanks
I'm not exactly sure what you tried, but here's a guess as to what's going on: if you've already loaded the package in your julia session, edits to the source files won't take effect unless you explicitly reload the package. There are some good workflow tips here, and more explanation of the module system here.
However, for a newbie the easiest thing might be to quit julia and restart.
As far as making changes to a package, as Gnumic commented, your best approach is to make a branch and commit your changes there. Once you become convinced your changes represent an improvement, consider sharing your changes with the rest of the world.
I have a problem with several references in my VB.NET project.
For example I have this line of code:
Dim m As New Chilkat.Email
It comes from the library "ChilkatDotNet45.dll".
When I click on "References" and locate this dll, I can see that it has the settings "Use local copy" and "Do not include interop types".
When I switch to Release mode, the compiler tells me that "Chilkat.EMail" is not defined.
I have this problem with several DLLs, so it is not specific to Chilkat.
Can somebody tell me what I did wrong?
Thank you.
One of the standard approaches to solving any programming-related issue is trying to reduce the scope of the investigation. If you have a big project, in which something doesn't work, try to create a smaller project, and try to replicate desired functionality in it. Reduce as much as possible, down to a brand new project with maybe 5-10 lines of code in it.
If you were unable to solve your problem after making a reduced test case, now it's good time to post it on StackOverflow. I am usually reducing problems while writing a question on SO (not before, as one might think), constantly thinking "ok, is it minimized enough"; and this is how 90% of the questions never get posted - I often find a solution along the way of reducing my question to bare bones. :)
In your case, can you build a simplified project which has this problem and post a link here? We could then try switching Debug to Release on our machines and see if the we can reproduce. There are too many options to do the guesswork.
I've got a really strange error and any light that anyone can shed on this would be greatly appreciated.
I made some changes to some VB6 source which builds a COM object. The automated build which builds our app returned an error. No problem I thought--I'll just back out my changes. Well backing out my changes isn't making the problem go away.
Specifically when I attempt to build the app via a .vbg file, with a command line like path\to\vb6\vb6 ProjectFile.vbg /make
I get a message
"Compile Error in File '', Line : Object library
invalid or contains references to object definitions that could not be
found."
As I said, I reverted the source code so I'm really stumped as to why this error is still occurring. Any VB6 gurus around who might be able to point me at an answer?
I can post the exact code in question but the fact that it was building correctly, stopped building correctly and now refuses to build correctly makes me think this is not a problem with my code but rather some problem in the environment. Like something got put in the registry as a result of the previous build error.
Any tips, hints, or suggestions greatly welcome. I realize my question is a bit sketchy but I'm not even sure what's important to include and what isn't.
EDIT 1:
Thanks for the excellent suggestions guys. I think it is something to do with VB6 doing some sort of auto-registration.
Just to add a bit more detail: this problem does not occur when I build the referenced vbp file from the IDE. It only happens on the make on the .vbg which contains the vbp. Also the build tool in question automatically pulls latest source and the error happens on both my local box and the dedicated build box.
EDIT 2:
Hi again all,
The release engineering fellow figured out how to get this to build in his build environment so it's currently ok. Once we're past this crunch, I'll try to interrogate him about what he did and share the details with everyone.
Thanks again for all the great suggestions. This is what's so great about SO; that is, I asked about a 10-year-old technology and I got several great and on-point ideas.
Make sure that the VBG and all the VBP's got rolled back as well. That error is consistent with a project trying to reference a CLSID that is no longer valid for the dependency. Have you tried loading up the project group and building from the IDE, if that works and you save and check in all the changes to the group and project files, you might be fixed up.
I'm guessing the fact that you mention that it was a COM component might be the source of the problem. If any of the public method's or properties have changed then I seem to remember that VB6 will change the interface GUIDs and auto register the new ones.
My suggestion would be to check the registry to look for any mention of the component name, make a note of any associated CLSIDs, back up the registry, and then delete the references.
As cmsjr mentions it could also be a bad CLSID reference in your .vbp files.
The other option is that the failure has caused a problem with some .tlb (type library) or olb (object library) files.
The best thing to do is move all your compatibility DLL to a separate and combined directory. The reason for this is control over what VB6 is using to check for binary compatibility. In addition the Typelibs that are generated IMPORT the references. So if you using Binary DLL Ver 10 for compatibility however the import is pulling in Binary DLL Ver 9 you will have issues. By keeping all the libraries in a single folder and pointing your projects to the DLLs in that folder you ensure that the respective TypeLib Import the correct version.
Finally if you have multiple levels of DLL reference each other. You may run into mysterious error where the VB6 is unable to compile using binary compatibility. In such cases you need to compile the lowest DLL in the hierarchy (Utility DLL perhaps) copy it over into the compatibility folders. Work your way up the chain until everything compiles in one shot again.
This is because if have DLL A reference DLL B which Reference DLL C. VB6 will get sometimes get confused if you make a change to A and C. will compile fine but A will not until the compatibility libraries are updated.
Hunt down and delete any .obj and .exp files that may be lying around from the previous failed build.
You will have to open the project & re-type in the lines that you changed.
Save the project alongwith VBG and re-compile after that.
I think that will fix it.
EDIT: The idea is that the cls/bas file remember the class (CLSID) that you used. So, if you change the references but don't change the lines in the cls/bas - it is a mismatch of type (what was referenced vs what is typed in cls/bas file).