dll locked by VS

Hi,
I'm new to VS-Development an have to write a little assembly for Reporting
Services. Every time a change something in the assembly, I call the
following .bat-file:
copy "D:\rw\Visual Studio
2005\wbiReports\wbiReports\bin\Debug\wbiReports.dll" "C:\Programme\Microsoft
SQL Server\MSSQL.3\Reporting Services\ReportServer\bin\"
copy "D:\rw\Visual Studio
2005\wbiReports\wbiReports\bin\Debug\wbiReports.dll" "\\wbi-lyta\C$\Program
Files\Microsoft SQL Server\MSSQL.3\Reporting Services\ReportServer\bin\"
copy "D:\rw\Visual Studio
2005\wbiReports\wbiReports\bin\Debug\wbiReports.dll" "C:\Programme\Microsoft
Visual Studio 8\Common7\IDE\PrivateAssemblies\"
But the last copy fails, if there is still one VS open. I normally have 3
projects open, 2 reports and the assembly-project. Now having to close not
only every project but even close all VSs is very annoying. Am I doing
anything wrong?
Regards,
RalphI have run into the same problem. The best workaround I found is to
use NUnit to do all of my testing for the assembly. When I'm done I
install it into the appropriate directories and modify and test my
reports. This allows me to avoid the problem for the most part.