Home → EstiMate Version 1 → Error Messages & Behavioral Problems → Compression error when trying to restore data?
The backup or the media you are trying to restore is corrupt. Try backing up again to different media.
If this step continues to fail then consider doing a manual backup of the data per knowledgebase artice #383
http://www.pricingmadeeasy.com/estimate/support/kbase_entry.php?id=383