Protel 99 SE on Windows 7 / Vista

As i am a programmer in most of my working time i come across problems and i try to find solutions for this problems.

Recently someone sent me a Protel 99 SE DDB file and ask me to review the schematics. I installed Protel 99 SE and i could not open the SCH document.

I have searched using Google to find some some solutions and came to discover that there is something about compatilibility with Windows 7 / Vista etc.

I had disabled UAC “User Access control”, checked directory and files rights, started the app as administrator, disable the “hide file extensions for known file types” in windows files settings. Nothing seemed to work.

Then i realized something:

1. My windows 7 boot partition was on drive D:

2. I have installed Protel 99 SE as defaulted to C:

I quickly uninstalled everything and installed it again on Windows  partition… ( D: in my case ) … and voila !

I was able to edit SCH documents once again !  It took me few long hours to discover the problem and i hope i might help someone else by posting it!

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10 Responses to “Protel 99 SE on Windows 7 / Vista”

  1. Balint Says:
    March 23rd, 2011 at 12:34 pm  (Quote)


    Well-loved. Like or Dislike: Thumb up 4 Thumb down 0

  2. sudhi Says:
    September 13th, 2012 at 4:40 am  (Quote)


    Like or Dislike: Thumb up 1 Thumb down 0

  3. Gembong Makelar Ndeso Says:
    October 4th, 2012 at 2:41 pm  (Quote)

    *** Just for sharing, Protel 99SE Vs Windows7, problem = dead audio. The solution = Please Install Protel 99SE in Save Mode position, —> restart = Ok. Thanks to God.
    (From Kediri-Indonesia with Love)

    Like or Dislike: Thumb up 2 Thumb down 0

  4. Jose Says:
    January 1st, 2013 at 6:46 am  (Quote)

    Thank you very much for the tip: Responses to “Protel 99 SE on Windows 7 / Vista”

    Like or Dislike: Thumb up 0 Thumb down 0

  5. Hanse Says:
    February 21st, 2013 at 10:58 am  (Quote)

    Does anyone have experience with Protel 99 on Window 8 ??
    Looking forward to your feedbacks

    Like or Dislike: Thumb up 0 Thumb down 0

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  8. besharat shokri Says:
    June 19th, 2015 at 2:00 am  (Quote)

    protel 99 modify and reduce size of windows system file named odbc.dll .
    in fact protel replace this windows original file with its installation file.
    until xp microsoft did not use this file so much.
    in windows 7 & 8 some core functions are handle with odbc.dll
    Then windows works improper .

    Like or Dislike: Thumb up 0 Thumb down 0

  9. SSJB Says:
    December 16th, 2016 at 9:55 am  (Quote)

    Watch Video ” Run Protel 99 SE on Window 7 & Solve library File Not Recognized Error”

    www youtube com/watch?v=R7Orthw0L1o

    Like or Dislike: Thumb up 0 Thumb down 0

  10. SSJB Says:
    December 17th, 2016 at 12:16 pm  (Quote)

    Dear Friends,

    I want to share the link of the video file which demonstrates how you can resolve the problem of “File not recognized” in Protel while adding libraries.

    I have tested it myself & got 100% result. Give it a try.

    Description of Video File on Youtube:
    Protel 99 SE “File Not Recognized” Library Error Solution “Windows 7”- Video Tutorial

    Link of Youtube:


    Like or Dislike: Thumb up 0 Thumb down 0

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