OK. Silly answer. I had an older version installed by QNX Momentics and, of course, added to path.
Further information: QNX 6.5.0 puts its unix executables (like ls, mkdir, etc.) in the path, which is aproblem because I then ended up with two ctags executables in the path. In QNX 6.6.0. and later the instalation doesn't put the QNX executables in the path directly but uses a .bat file that is has to be executed in order to have them (like when you need compilation).