Errors occurred but error messages are not detailed in the repository or in the report files.
This is a known issue in SilkPerformer 6.5, 6.5.1 and 6.6. The problem will occur if you have custom functions in bdh files and are calling these functions from your script. If an error occurs in one of your custom functions then Silk Performer will still report that an error occurred but is unable to display the error message itself. This is fixed in SilkPerformer 7.0.
As a workaround you can paste your custom functions into the script and call them from there.