[rjsw]

They are not even using the newest version of AP203.

  #93459=APPLICATION_PROTOCOL_DEFINITION('international standard', 'config_control_design',1994,#93458);

I will feel free to ignore comments on AP242 from PTC if they can't be bothered to use it.

[auxiliarymoose]

Creo (and Onshape) both support STEP AP242 export, but customers may choose to export to an older version for better compatibility with third-party systems that have not implemented recent standards.

Generally, at export time, choosing the oldest format version which still has all of the features you need will make it most likely others will be able to open the data.