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Cant do anythig with Mathcad window
windbg shows: wow64win!NtUserGetMessage+0x14
00000000`0009e5c8 00007ff8`d008399e : 00007ff8`d0ea5ba0 00007ff8`d0ea5c7f 00000000`00000000 00000000`00000003 : wow64win!NtUserGetMessage+0x14
00000000`0009e5d0 00007ff8`d0ea90da : 00000000`0033e000 00007ff8`d0ea6f60 00007ff8`d0ea8600 00000000`00efe644 : wow64win!whNtUserGetMessage+0x2e
00000000`0009e630 00000000`776317c3 : 00000023`761f101c 00007ff8`d0ea0023 00000000`00000000 00000000`00effe0c : wow64!Wow64SystemServiceEx+0x15a
00000000`0009eef0 00000000`776311b9 : 00000000`00effd24 00007ff8`d0ea3a74 00000000`0009efc0 00007ff8`d0ea3b6f : wow64cpu!ServiceNoTurbo+0xb
00000000`0009efa0 00007ff8`d0ea3989 : 00000000`0033d000 00000000`00400118 00000000`00000000 00000000`0009f800 : wow64cpu!BTCpuSimulate+0x9
00000000`0009efe0 00007ff8`d0ea337d : 00000000`00000000 00000000`00154388 00000000`00000000 00000000`00000000 : wow64!RunCpuSimulation+0xd
00000000`0009f010 00007ff8`d1e8380f : 00007ff8`d1ed5a10 00007ff8`d1ed5a10 00000000`00000010 00000000`0033c000 : wow64!Wow64LdrpInitialize+0x12d
00000000`0009f2c0 00007ff8`d1e24e3b : 00000000`00000001 00000000`00000000 00000000`00000000 00000000`00000001 : ntdll!LdrpInitializeProcess+0x18cf
00000000`0009f6e0 00007ff8`d1e24cc3 : 00000000`00000000 00007ff8`d1db0000 00000000`00000000 00000000`0033e000 : ntdll!LdrpInitialize+0x15f
00000000`0009f780 00007ff8`d1e24c6e : 00000000`0009f800 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!LdrpInitialize+0x3b
00000000`0009f7b0 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : ntdll!LdrInitializeThunk+0xe
Check compatibility between MathCAD 15 and Excel versions.
MathCAD 15 is VERY old and no longer supported by PTC.
The error you're experiencing suggests that there might be compatibility issues between Mathcad 15 and Microsoft Excel 2013. The Windows Debugger (WinDbg) output indicates the issue might be with the Windows on Windows (WoW64) subsystem, which is the part of the Windows OS that allows running 32-bit applications on a 64-bit system.
Mathcad 15 is a bit older software and it was designed to work best with the software versions available at the time of its release. Mathcad 15 is officially compatible with Microsoft Excel up to the 2010 version.
Here are a few suggestions to troubleshoot this issue: