STPLS:  Compute  and  print  optimum step sizes for numerically  approximating
         derivatives; return selected step sizes

         REAL XM(n,m), PAR(npar), STP(npar)
         DOUBLE PRECISION DSTAK(ldstak)
         COMMON /CSTAK/ DSTAK
         EXTERNAL NLSMDL
         :
         :
         CALL STPLS (XM, N, M, IXM, NLSMDL, PAR, NPAR, LDSTAK, STP)


 Argument definitions are given in the on-line STARPAC User's Guide.
 The ACCESS document describes how to print a copy of the Guide.