
If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the TPP file should operate with your programs without any problem.
Drivers of equipment used by the computer to open a TPP file are out of date. The computer does not have enough hardware resources to cope with the opening of the TPP file. The TPP file which is being opened is infected with an undesirable malware. Incomplete installation of an application that supports the TPP format. Accidental deletion of the description of the TPP from the Windows registry. Incorrect links to the TPP file in registry entries. Corruption of a TPP file which is being opened. There may be other problems that also block our ability to operate the Borland Pascal Protected Mode Units file.
The inability to open and operate the TPP file does not necessarily mean that you do not have an appropriate software installed on your computer. Possible problems with the TPP format files