The CMake file of the plugin looks for the storescp binary in ${DCMTK_DIR}/bin, but if DCMTK_DIR points to a DCMTK install directory when configuring MITK then later the value of the variable becomes .../share/dcmtk later on at the MITK project level, and the storescp command won't be found.

The share/dcmtk subdirectory contains DCMTKConfig.cmake.

I recommend to look for the storescp binary in ${DCMTK_DIR}/../../bin as well.

Pull request follows.