[The filename, directory name, or volume label syntax is incorrect]

I don't have pro (for now I am only working with this for me personally) and the latest community version available is 6.6.0 if I'm not mistaken. I have tried with 6.6.0 again and the error is the same (I edited the OP accordingly so that it says 6.6.0 instead of 6.4.3 now).

[The filename, directory name, or volume label syntax is incorrect]

I am trying to upgrade from iReport Designer 5.6.0 to JasperSoft Studio 6.6.0. While in iReport Designer I can run reports without problems I am having trouble to do the same in JasperSoft Studio. I could connect to the repository just fine, can open reports in design mode and switch to the preview but when I select "Run Report Unit" from the menu it fails with this error:

The filename, directory name, or volume label syntax is incorrect java.io.IOException: The filename, directory name, or volume label syntax is incorrectat java.io.WinNTFileSystem.createFileExclusively(Native Method)at java.io.File.createNewFile(File.java:1012)at com.jaspersoft.studio.server.editor.ReportRunControler$2.run(ReportRunControler.java:258)at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)[/code]

It has already been asked here but I don't see any solution there. It ends with someone saying "Needed to make sure that the datasources were added" but I did already add the data sources.

I have used Process Monitor to watch what Jaspersoft Studio.exe does in that moment and found that the invalid file path comes from the temp path being included twice:

How can I influence that temp path, is there any setting for it? To me it looks like a bug in the software but there must be a way to influence that from configuration, since it doesn't seem to be a very common error.