MSBuild fails to copy dlls from relative path - msbuild

Question

Solution Directory contains ExtraDlls And Project Directories.
In the Project.csproj file we have references of dlls in the ExtraDlls with relative path. The Dlls in the ExtraDlls directory are always available.
<Reference Include="xyx, Version=7.3.0.0, Culture=neutral, PublicKeyToken=<sometoken>">
<SpecificVersion>False</SpecificVersion>
<HintPath>..\ExtraDlls\A.dll</HintPath>
</Reference>
<Reference Include="xyz, Version=7.4.0.0, Culture=neutral, PublicKeyToken=<sometoken>">
<SpecificVersion>False</SpecificVersion>
<HintPath>..\ExtraDlls\B.dll</HintPath>
<Private>True</Private>
</Reference>
Using below batch file to publish web project. But it fails with below mentioned details.
SET MSBUILD_PATH="C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Current\\Bin"
SET PUBLISH_DIRECTORY="C:\publish\ProjectA"
SET PROJECT_DIR="C:\SolutionDir\ProjectDir"
SET PROJECT="C:\SolutionDir\ProjectDir\Project.csproj"
cd %PROJECT_DIR%
%MSBUILD_PATH%\MSBuild.exe %PROJECT% /p:DeployOnBuild=True /p:DeployDefaultTarget=WebPublish /p:WebPublishMethod=FileSystem /p:DeleteExistingFiles=True /p:publishUrl=%PUBLISH_DIRECTORY%
PreBuildEvent:
copy "..\ExtraDlls\A.dll" "C:\SolutionDir\ProjectDir\bin\"
copy "..\ExtraDlls\B.dll" "C:\SolutionDir\ProjectDir\bin\"
The system cannot find the path specified.
The system cannot find the path specified.
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(1328,5): error MSB3073: copy "..\ExtraDlls\A.dll" "C:\SolutionDir\ProjectDir\bin\" [C:\SolutionDir\ProjectDir\Project.csproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(1328,5): error MSB3073: copy "..\ExtraDlls\B.dll" "C:\SolutionDir\ProjectDir\bin\" [C:\SolutionDir\ProjectDir\Project.csproj]
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\MSBuild\Current\Bin\Microsoft.Common.CurrentVersion.targets(1328,5): error MSB3073: " exited with code 1.
Already tried with changing root directory in batch file. i.e. when root directory set with one containing MSBuild.exe, still getting the same issue.
Setting References updated with $(SolutionDir) didn't help.
e.g. $(SolutionDir)..\ExtraDlls\B.dll
There are many more references from ExtraDlls but showing error only for above two. Tried with changing relative path to absolute path in project.csproj file but still same error. So looks like it is being referenced from somewhere else.

Answer 1

In the project.csproj file, in the PreBuildEvent section the code is added if SolutionDir is not available then use ..\ (which visual studio can understand I guess) but MSBuild was throwing error or actually checking path starting with .\ which doesn't exist.
While using MSBuild.exe command pass a property /Property:SolutionDir="Path to solution file directory" which resolves all references and now getting all ExtraDlls copied correctly.
e.g.
MSBuild /Property:SolutionDir=%SOL_DIR_PATH% %PROJECT_SLN_PATH%\%PROJECT_DIRECTORY_NAME%\%PROJECT_NAME% /p:DeployOnBuild=True /p:DeployDefaultTarget=WebPublish /p:WebPublishMethod=FileSystem /p:DeleteExistingFiles=True /p:publishUrl=%PUBLISH_DIRECTORY%\%PROJECT_DIRECTORY_NAME%