Last week we received troubling reports from several DataCAD firms who were unable to open any of their drawings without an immediate crash. The temporary file ($WP) was being created, but the drawing would only flash on the screen for a split second before crashing. There was no error message displayed. In one case, the customer couldn't even create a new drawing. Each customer is running a different version of DataCAD (15, 17, & 18).
They all shared a couple of things in common: Each firm has multiple licenses on DataCAD and access their drawing files from a file server, and they all are running Windows 7 on their workstations.
What we discovered is that they all started experiencing the problem after installing a recent update to Windows 7.
https://support.microsoft.com/en-us/help/4054518
After backing off the Windows 7 update, their DataCAD operation returned to normal.
If you are running DataCAD on Windows 7 and you suddenly are unable to open any of your drawings, check your recent Windows updates to see if "December 12, 2017—KB4054518 (Monthly Rollup)" or "December 12, 2017—KB4054521 (Security-only update)" was installed. If so, remove the update and see if your DataCAD returns to normal operation.
They all shared a couple of things in common: Each firm has multiple licenses on DataCAD and access their drawing files from a file server, and they all are running Windows 7 on their workstations.
What we discovered is that they all started experiencing the problem after installing a recent update to Windows 7.
https://support.microsoft.com/en-us/help/4054518
After backing off the Windows 7 update, their DataCAD operation returned to normal.
If you are running DataCAD on Windows 7 and you suddenly are unable to open any of your drawings, check your recent Windows updates to see if "December 12, 2017—KB4054518 (Monthly Rollup)" or "December 12, 2017—KB4054521 (Security-only update)" was installed. If so, remove the update and see if your DataCAD returns to normal operation.