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    <title>topic Re: Unable to open Mathcad Prime 11 Student. Older editions work but not able to open new files in Mathcad</title>
    <link>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046456#M219857</link>
    <description>&lt;P&gt;On your drive where windows is installed (usually C:), there's a folder&lt;/P&gt;
&lt;P&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp;C:\ProgramData&lt;/P&gt;
&lt;P&gt;(it's normally hidden, but you can type this in the top bar of windows explorer to go there.&lt;/P&gt;
&lt;P&gt;Dig deeper and you will find:&lt;/P&gt;
&lt;P&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp;C:\ProgramData\PTC\Mathcad Prime&lt;/P&gt;
&lt;P&gt;In there is a file named:&lt;/P&gt;
&lt;P&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp;MathcadPrime.exe.Config&lt;/P&gt;
&lt;P&gt;a few kB in size. And or a file&lt;BR /&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp; MathcadPrime.V7.Config&lt;/P&gt;
&lt;P&gt;The file(s) contain configuration info, but sometimes get(s) corrupted and prevents Prime from starting normally.&lt;/P&gt;
&lt;P&gt;You can delete them and then retry to start Prime.&lt;/P&gt;
&lt;P&gt;Prime needs the file(s) but will re-create any missing.&lt;/P&gt;
&lt;P&gt;Hope this helps.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Success!&lt;BR /&gt;Luc&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
    <pubDate>Fri, 05 Dec 2025 18:31:57 GMT</pubDate>
    <dc:creator>LucMeekes</dc:creator>
    <dc:date>2025-12-05T18:31:57Z</dc:date>
    <item>
      <title>Unable to open Mathcad Prime 11 Student. Older editions work but not able to open new files</title>
      <link>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046318#M219840</link>
      <description>&lt;P&gt;Im unable to open my Mathcad Prime 11.0.1.0 Student Edition. The app randomly crashed on me one day and when I tried opening it again, it does not do anything. No white screen, no error message, nothing happens. I've tried installing Mathcad Prime 10 but I am unable to use the files that I have in older editions.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I've tried multiple things:&lt;/P&gt;&lt;P&gt;- I've uninstalled and reinstalled.&lt;/P&gt;&lt;P&gt;- Deleted Files and tried running it.&lt;/P&gt;&lt;P&gt;- Tried running it using different compatibility modes.&lt;/P&gt;&lt;P&gt;- Tried running it as an administrator.&lt;/P&gt;&lt;P&gt;- Created Backup files.&lt;/P&gt;&lt;P&gt;- Nothing worked.&lt;/P&gt;&lt;P&gt;- Restarted computer&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;Again, I'm not sure how to fix this. If you could please assist me with this issue, I would greatly appreciate it. Thank you.&lt;/P&gt;</description>
      <pubDate>Fri, 05 Dec 2025 06:43:17 GMT</pubDate>
      <guid>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046318#M219840</guid>
      <dc:creator>YO_14203239</dc:creator>
      <dc:date>2025-12-05T06:43:17Z</dc:date>
    </item>
    <item>
      <title>Re: Unable to open Mathcad Prime 11 Student. Older editions work but not able to open new files</title>
      <link>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046323#M219842</link>
      <description>&lt;P&gt;Hi,&lt;/P&gt;
&lt;P&gt;open&amp;nbsp;&lt;STRONG&gt;Event Viewer&lt;/STRONG&gt; application and try locating error message related to&amp;nbsp;&lt;SPAN&gt;Mathcad Prime 11.0.&lt;FONT size="6"&gt;&lt;STRONG&gt;1&lt;/STRONG&gt;&lt;/FONT&gt;.0.&lt;/SPAN&gt;&lt;/P&gt;
&lt;P&gt;&lt;SPAN&gt;You can also try installing&amp;nbsp;Mathcad Prime 11.0.&lt;FONT size="6"&gt;&lt;STRONG&gt;0&lt;/STRONG&gt;&lt;/FONT&gt;.0. Installation zip file is available on&amp;nbsp;&lt;A href="https://support.ptc.com/appserver/auth/it/esd/academicFree.jsp" target="_blank"&gt;https://support.ptc.com/appserver/auth/it/esd/academicFree.jsp&lt;/A&gt;&amp;nbsp;page.&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Fri, 05 Dec 2025 07:19:00 GMT</pubDate>
      <guid>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046323#M219842</guid>
      <dc:creator>MartinHanak</dc:creator>
      <dc:date>2025-12-05T07:19:00Z</dc:date>
    </item>
    <item>
      <title>Re: Unable to open Mathcad Prime 11 Student. Older editions work but not able to open new files</title>
      <link>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046339#M219844</link>
      <description>&lt;P&gt;What OS?&lt;/P&gt;</description>
      <pubDate>Fri, 05 Dec 2025 09:33:35 GMT</pubDate>
      <guid>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046339#M219844</guid>
      <dc:creator>VladimirN</dc:creator>
      <dc:date>2025-12-05T09:33:35Z</dc:date>
    </item>
    <item>
      <title>Re: Unable to open Mathcad Prime 11 Student. Older editions work but not able to open new files</title>
      <link>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046456#M219857</link>
      <description>&lt;P&gt;On your drive where windows is installed (usually C:), there's a folder&lt;/P&gt;
&lt;P&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp;C:\ProgramData&lt;/P&gt;
&lt;P&gt;(it's normally hidden, but you can type this in the top bar of windows explorer to go there.&lt;/P&gt;
&lt;P&gt;Dig deeper and you will find:&lt;/P&gt;
&lt;P&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp;C:\ProgramData\PTC\Mathcad Prime&lt;/P&gt;
&lt;P&gt;In there is a file named:&lt;/P&gt;
&lt;P&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp;MathcadPrime.exe.Config&lt;/P&gt;
&lt;P&gt;a few kB in size. And or a file&lt;BR /&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp; MathcadPrime.V7.Config&lt;/P&gt;
&lt;P&gt;The file(s) contain configuration info, but sometimes get(s) corrupted and prevents Prime from starting normally.&lt;/P&gt;
&lt;P&gt;You can delete them and then retry to start Prime.&lt;/P&gt;
&lt;P&gt;Prime needs the file(s) but will re-create any missing.&lt;/P&gt;
&lt;P&gt;Hope this helps.&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Success!&lt;BR /&gt;Luc&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Fri, 05 Dec 2025 18:31:57 GMT</pubDate>
      <guid>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046456#M219857</guid>
      <dc:creator>LucMeekes</dc:creator>
      <dc:date>2025-12-05T18:31:57Z</dc:date>
    </item>
    <item>
      <title>Re: Unable to open Mathcad Prime 11 Student. Older editions work but not able to open new files</title>
      <link>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046562#M219874</link>
      <description>&lt;P&gt;Update: I have tried Martin's solution and now it runs perfectly fine and I am able to open files in Mathcad. Thank you Martin and thank you everyone else for your time and support!&lt;/P&gt;</description>
      <pubDate>Sun, 07 Dec 2025 16:31:01 GMT</pubDate>
      <guid>https://www.ptcusercommunity.com/t5/Mathcad/Unable-to-open-Mathcad-Prime-11-Student-Older-editions-work-but/m-p/1046562#M219874</guid>
      <dc:creator>YO_14203239</dc:creator>
      <dc:date>2025-12-07T16:31:01Z</dc:date>
    </item>
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