Domino Mailbox tool hung with NAMELookup2 - lotus-domino

Question

We have developed the tools to read the emails from the Domino mailboxes and write those into the separate file in local disk(Its look like a backup). Recently we have created a new domino 9 test environment with our lab. But, our tools not working properly with our new domino work environment. To identify the problem about this issue, I have added some debug logs and it seems to look like the control hanged with the function "NAMELookup2". Here, I have added the code snippet,
DHANDLE hLookup;
char *pLookup;
if (NAMELookup2("Local", 0, 1, "$users", 1, dominoUser, 2, "FullName", &hLookup) == NOERROR) // hunged with this line
{
pLookup = (char *) OSLockObject(hLookup);
}
The same tool working fine with our other test environment. So, I think there is no problem with the code. I suspect that maybe the problem with our new work environment setup creation, or maybe missed to provide some kind permission to the users, or maybe I missed to add the mailboxes somewhere, etc.
Note:
I have run the tool with admin privilege user.
It would be great if anyone gives some direction on this.
Thanks,

Answer 1

See this NAMELookup2 page for reference. The function is declared as:
STATUS LNPUBLIC NAMELookup2(const char far *ServerName, DWORD Flags,
WORD NumNameSpaces, const char far *NameSpaces,
WORD NumNames, const char far *Names,
WORD NumItems, const char far *Items,
DHANDLE far *rethBuffer);
where NumItems is the number of null-terminated item names starting at the Items address. The code snippet in your question is passing a single item name ("FullName"), but is setting NumItems to 2. That is clearly wrong and could explain the hang. NumItems should be 1.
I am also suspicious of the ServerName argument. The documentation recommends passing NULL when you want to do a local lookup. Passing "Local" may be another way to accomplish the same, but you need to change your code in any case. I recommend changing the first argument to NULL.