Hi Caleb1987 - thanks for the answer, you are right: It all works when I explicitly use the 32-bit version of Python. But I just discovered, that FeatureClassToFeatureClass to a personalgeodatabase with ArcCatalog also fails. No Python is involved, I right-click inside a personal geodatabase and choose "import". I get this errormessage: Messages Executing: FeatureClassToFeatureClass C:\A\test2\TestX1.gdb\Linie2 C:\A\test2\TestX2.mdb Linie2 # "SHAPE_Length "SHAPE_Length" false true true 8 Double 0 0 ,First,#,C:\A\test2\TestX1.gdb\Linie2,SHAPE_Length,-1,-1" # Start Time: Wed Jan 30 08:00:47 2013 ERROR 999999: Error executing function. Failed to execute (FeatureClassToFeatureClass). Failed at Wed Jan 30 08:00:48 2013 (Elapsed Time: 1,00 seconds) Is there a workaround for this problem too? Has ESRI announced a stop for supporting the .mdb-format with 64-bit? If so, I will stop using it to avoid problems and workarounds. Some functions seems to work (i.e. create featureclass), while others do not. Thanks a lot Svend
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