Hi,
>> make sure when I save autocad file it will not be in PS format.
First at all, the file that AutoCAD stores as BAK file is not in PS-format.
You can easily try that by renaming the extension of the file form .BAK to .DWG and you'll see that this file can be opened with AutoCAD.
Also a proof: you can not open the BAK file with Photoshop, when the file was created by AutoCAD.
The basic declaration:
Windows does not know which program had created a file. Windows only know the extension of a file and that gives conflicts like you do have.
- AutoCAD creates a BAK file
- Photoshop creates BAK files
- other software also creates BAK files
And when windows see some of the files it does not know if the BAK files was created from AutoCAD, from Photoshop, from any other software.
Windows has only one association for one extension. So when you installed Photoshop the installer made Windows thinking that a BAK-file is from Photoshop. That is why you see in the Windows explorer a BAK file marked as Photoshop file ... independent of which software created that file really.
Windows does not support to have multiple associations, because in that case it would need to identify internals of the file to know if the BAK file was created by AutoCAD or Photoshop or anything else.
So with other words: when Windows shows you that the BAK file is a Photoshop file, it is not true, Windows does not know that, it was just told to think that this should displayed for BAK-files.
>> make sure when I save autocad file it will not be in PS format.
Even if you now change the Windows setting that BAK-file will be assigned to AutoCAD you'll get another problem ==> every BAK file from Photoshop will then be displayed as AutoCAD file ... also not the true 😉
Hope that is now better to understand, - alfred -
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Alfred NESWADBA
ISH-Solutions GmbH / Ingenieur Studio HOLLAUS
www.ish-solutions.at ...
blog.ish-solutions.at ...
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CDay 2025------------------------------------------------------------------------------------
(not an Autodesk consultant)