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Backup to File Problem (7.5.387,

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Having trouble with Retrospect since upgrading to version 7.5.


I have created a script to backup to a single file on a USB drive and the execution finishes as incomplete with error -641 (chunk checksum didn't match), an error saying Bad Backup Set header found, or Retrospect Crashes with Assertion Failure at "elm.cpp993".


I have also tried:

1. Backing up data to a single file on the local disk, c: (not the external usb drive)

2. Test backup of a text file to a single backup file on the local disk (backing up different data)

3. Deleting / Recreating Backup file etc.


Retrospect seems to backup perfectly normally my external LTO Tape drive.


any ideas?

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