Linker error

I have installed FlexCel6 in XE7 successfully.
Since then, when compiling a C++ Builder 64 bit project I get a linker error:

[ilink64 Error] Fatal: Unable to open file '_PDFTAGS.IPDFTAGGER.O'

The project does not use FlexCel at all. Nevertheless I get this error.
Any idea, what's wrong here?

Can you open the .cbproj with a text editor and make sure that no FlexCel references are on it?

Ok. Problem solved. I tried to migrate a project created with an earlier version of RAD-Studio and this project contained a wrong reference.