Problem with creating list box or other controls

[ptc-4958475]

I have created numerous worksheets with list boxes controls in MathCAD 13. Now, when trying to open those worksheets in MathCAD 14 the list boxes do not work and a message "Value cannot be null. Parameter name: pUnk". Same thing happens when reviewing examples from Quicksheets or other downloaded example worksheets from the internet. I do not seem to recall that I was ever able to open and execute a list box after upgrading to MathCAD 14. Also, when trying to Insert -- Control -- List Box (or any other control) ... nothing happens. Any idea on how to make the list boxes (and the other controls) work again? Thanks for your help

[VladimirN]

Hi Peter,

Maybe this tip will help you: http://communities.ptc.com/message/199124#199124

... find mcmreg.exe (C:\Program Files\Mathcad\Mathcad 15), start it and navigate to the *.mcm files in the C:\Program Files\Mathcad\Mathcad 15 folder and register them that way...