You have to be at VFP6 SP3 or later. The SESSION class was not available until VFP6 SP3.

>I've also had problems with PDM today. I downloaded it, tried to execute PDM.exe, and got the error message "Class definition SESSION not found". I don't see this class anywhere in the project. I was planning on looking into this further, but as a not-too-advanced VFP-er, I'm not sure where to begin.
>
>P.S. I'm running under VFP6 and W2K.
>
>
>>>I believe the source code is now included. So you should recompile in your version of VFP.
>>>
>>>>I just downloaded PDM from UT download section. The program looks promising has got great review but I am not able to run the program.
>>>>when I dbl-click the PDM.exe file I get the following message:
>>>>"Can not locate the Microsoft Visual FoxPro support library"
>>>>
>>>>I have VFP7 installed and I am running W2K.
>>>>
>>>>Just thought I'd check here if anybody else go the same kind of message and if there is a solution to my problem.
>>>>
>>>>Thanks,
>>>>Einar
>>
>>Thanks Mark