• Bad CAD magic number [INTERNAL 002]
• Invalid CAD file: Too short [INTERNAL 010]
• Invalid CAD file: Zero length [INTERNAL 009]
• Invalid record length [INTERNAL 003]

The error types in this file that have not yet been converted are documented here:

Invalid spec length
+ 25 Type 0 (Unknown) Layer 12

This message means that a CAD or CLD file was found that we cannot process. The reason as we saw it is given in the message. Please try to open the file with your CAD or Composer system. If it seems to be fine, send it to us for analysis. If not, there may be a problem to be addressed at your end.