Batch Render problems (strange message, black render)

Hi,

All of a sudden batch renders in my scene produce a weird error message:

[2010/Jul/21|09:28:17] V-Ray: Irradiance map saved successfully
[2010/Jul/21|09:28:17] V-Ray: Rendering image…
[2010/Jul/21|09:28:17] V-Ray[2010/Jul/21|09:28:17] V-Ray[2010/Jul/21|09:28:17] V-Ray[2010/Jul/21|09:28:17] V-Ray error: error: [VFBCore::SetRegion] Error writing render region to raw image file.
error: [VFBCore::SetRegion] Error writing render region to raw image file.
error: [VEFrBrCoorr:e :[:VSFeBtCore::SReetgRieogni]o nE]r rEorrr owrr iwtriintgi nrge nrdeenrd erre grieogni otno troa wr aiwm aigmea gfei lfei.l
e.
[VFBCore::SetRegion] Error writing render region to raw image file.
Error: [VFBCore::SetRegion] Error writing render region to raw image file.
Error: [VFBCore::SetRegion] Error writing render region to raw image file.
Error: [VFBCore::SetRegion] Error writing render region to raw image file.
[2010/Jul/21|09:28:18] V-Ray error: Cannot write output image file “D:/maya/projects/10_18_albyato/Foyer//images/foyer_F6_rlyr/cam_F1_10_07_210001.exr”
Error: Cannot write output image file “D:/maya/projects/10_18_albyato/Foyer//images/foyer_F6_rlyr/cam_F1_10_07_210001.exr”

Using Maya 2011 x64 on Vista x64 with:

[2010/Jul/21|09:27:21] V-Ray: V-Ray for Maya version 1.50.SP1 from Jul 6 2010, 09:44:48
[2010/Jul/21|09:27:21] V-Ray: V-Ray core version is 1.90.03

Hmm.. after closing Maya and redoing a batch render on the same scenes with same settings it is working again. If it ever comes up again, I’ll send in a scene. At the moment I cannot reproduce it .