KB: Troubleshoot SOLIDWORKS CoDesigner panel error - There is no document opened

Solution Details

CoDesigner stores the link to Altium's PCB Project (and some other properties) in the PCB assembly properties in SOLIDWORKS.  When SOLIDWORKS creates the SpeedPak, it deletes those properties.
 
The simplest solution for such an unlinked assembly is to pull the board from the Altium Server into a local folder, copy the properties of that healthy temporary PCB Assembly, then paste them to the properties of unlinked assembly.
 
To avoid this situation in the future, simply add one more configuration together with adding the SpeedPak. That configuration will keep Altium's properties alive.

 
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Source URL: https://www.altium.com/documentation/knowledge-base/altium-designer/troubleshoot-solidworks-codesigner-panel-error--there-is-no-document-opened