How to solve issue: "mcr: Command not found."

I'm running compiled executable on Linux machine using version 2014b. The MCS starts and presents:

          MCR VERSION YOU ARE USING IS 2014b
          MCR WRAPPER VERSION YOU ARE USING IS 2.1
          Running Mcr ......_____
But then I'm getting:
        mcr: Command not found.
Checked the path, mcr_root and LD_LIBRARY_PATH, thay all look ok.
What am I missing?
How to debug