exception - Delphi: EReadError with message 'Property Persistence does Not Exist' -


My program written with Delphi 7 is fine, but when I run it gives me an error message:

< P> Project 1 XCE has raised the exception class, whose message 'property is not firmly present' has stopped.

It started only after installing the TMS Component Pack to be used with this project.

  • Thank you for any help.

    • class = "post-text" itemprop = "text">
    1. Open form in Delphi IDE
    2. to DFM source Use Alt + F12 to edit
    3. Find "firmness" property
    4. Delete row with "firmness" property

    DFM example : 

      SomeComponent1 = TSomeComponent OtherProperty = OtherValue Persistence = True AnotherProperty = AnotherValue End

    In addition to this you can use the great DFMC Check 1.4 tool by Android HouseLanden. Are there. To check any other missing property such as:

    This compiled & amp; The installed package is out of sync with the actual .pas file. If you have a source code then it will probably fix the package again.


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