Library /sys$common/syshlp/basichelp.hlb Compile time errors, JMPOUTPRO  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  ERROR - In a source file containing more than one  program  module,  a
  statement  attempts  to transfer control from one module into another.
  Change the statement that attempts to  transfer  control;  you  cannot
  transfer control into a different program module.