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Delphi XE5. Downloaded source and copied to my folders.

Compiling Win32/Debug in all cases.

dac190 compiles.
davcl190 compiles.
dcldac190 compiles.
mydac190 gives 9 errors in MyClasses.pas. All Method 'xyz' not found in base class.

They are all referencing CRAccess.pas. I checked and I only have one copy of CRAccess.pas. The referenced methods are there.

mydac190 search path (..) is correct. Delphi Search path is correct.

dcu, dcl and bpl files are going in the right places.

I give up. Gone back to 8.1.4.

We can not reproduce the problem.
It seems that there are some old DAC units on your computer.
To solve the problem perform the following steps:
- uninstall MyDAC;
- find all DAC units, like CRParser.dcu, CLRClasses.dcu, MemData.dcu, MemDS.dcu, DBAccess.dcu, MyClasses.dcu files on your PC and delete them;
- find all *dac*.bpl files on your PC and delete them.
- install MyDAC.

Finally figured it out. I had to delete all the myDAC bpl's and dcp's from System32, SysWow64 and ProgramFiles(x86)\Embarcadero\... I now have 8.3.X installed and compiling.

It is good to see that the problem has been solved. Feel free to contact us if you have any further questions.