OK - so, how many frames were you integrating?
Can you integrate those frames using the standard ImageIntegration process (as opposed to the BatchPreprocessing script)?
I don't use the BatchPreporcessing script myself, for no other reason than I like to work my own way through the preprocessing stages, just to be sure nothing untoward happens as the the sequence progresses.
What happens if you tick the Calibration Only checkbox in the Integration section? Does the process run to completion and produce a full set of images ready for integration? Can you then integrate those images using the ImageIntegration process?
If the script does execute to completion (as described above), but ImageIntegration still fails, what error messages do you get (either on-screen, or in the ProcessConsole window)? If you examine the calibrated images that are failing the ImageIntegration step - are there any images that 'appear' to be different or unusual in any way?
By the way, do you get any report in the ProcessConsole window when you see the error messagethat you have posted?
Sorry about all the questions, but your extremely short posts and a lack of a detailed description means that the information needs to be sniffed out. It is extremely unlikely that your error messages, alone, will suggest a simple 'quick fix' (unless the author(s) of the script know of issues that can trigger this message).
Unfortunately I have spent almost forty years providing technical support (by HF radio (even using morse code), by phone, by fax and by email) - you have to try and imagine me trying to put myself in your chair, in front of your PC and then trying to replicate, analyse and resolve your isuue without ever actually being there!!!
I will try my best