Users are required to incorporate a “use” statement near the top of their program for the IMSL routine being called when writing new code that uses this library. However, legacy code which calls routines in the previous version of the library without the use of a “use” statement will continue to work as before. Also, code which employed the “use numerical_libraries” statement from the previous version of the library will continue to work properly with this version of the library.

Users wishing to update existing programs so as to call other routines from this library should incorporate a use statement for the specific new routine being called. (Here, the term “new routine” implies any routine in the library, only “new” to the user’s program.) Use of the more encompassing “imsl_libraries” module in this case could result in argument mismatches for the “old” routine(s) being called. (This would be caught by the compiler.)

Users wishing to update existing programs so as to call the new generic versions of the routines must change their calls to the existing routines so as to match the new calling sequences and use either the routine specific interface modules or the all encompassing “imsl_libraries” module.