ISMBLD.SBX 2.1(134) enhancement: new optional parameter (exprecs) may be used to specify the expected / eventual number of records, to improve the IBF_AUTOBLKLVL (auto configure index) calculations.
xcall ISMBLD, opflags, status, fspec, keysiz, keypos, recsiz, reccnt {, idadev, infile, maxrecs, idxblksiz, idxlvls, extrablks, exprecs}
Also note: this version of ISMBLD.SBX is backwards compatible to 6.0.
