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Design Entry CIS dsn corruption?

I can open the project in CIS. I can see the dsn file under "Design Resources" on the file tree. There is a "+" next to the .dsn file, representing multiple schematic pages. When I click the "+", or the dsn folder Icon, the "+" disappears and the schematics do not open. Looking at the dsn file in windows explorer, it has a 400K file size. Closing CIS and restarting, I click "File --> Open --> Design, and I select the .dsn file. I initially got a message about needing to create a project for it. Clicking "OK" would bring up a text file window with the name of the dsn, instead of the schematics. I repeated this several times. Now when I click "File --> Open --> Design, and I select the .dsn file, its the same as opening the project mentioned above. I can open other projects with no issue. I have Orcad 16.01 Any ideas?

split63 over 13 years ago

Fortunately, I had an automatic backup the night before. Was able to restore the dsn file and now all is good. The good file was about 200K, the corrupted file was 400K. I believe the corruption occurred when using Orcad PCB editor, I was clicking on nets and then they were being highlighted in CIS. At one point cross link stopped working. I did not save the file in CIS that I recall, so how the corruption occured, I don't know.
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