For those following the thread, the problem was caused by a bad user symbol that contained invalid data - Arcs with zero height and width.

The update to Stardraw Design 7.4 published August 15th 2025 includes a fix to cater for this scenario.


Kind regards,
Rob Robinson
Stardraw.com

Yes, please email the .S07 file along with exact steps to reproduce the effect to techsupport@stardraw.com 

Kind regards,
Rob Robinson
Stardraw.com

I've been creating quite a few custom symbols, and occasionally when I export the symbol as a .s01 file, I get the "Parameter is not valid" error message I pasted below.  The .s01 file is created, but it appears in the Symbol Browser as a red X (the 2nd image I pasted below).  If you would like me to send the original .s07 file via email, please let me know.  Thanks.