$PROBLEM

NONMEM Problem description.

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$PROBLEM  [string]
;# Example
$PROB  THEOPHYLLINE   POPULATION DATA

Discussion

Every NONMEM model requires a $PROBLEM record as the start a problem. The string is a literal with maximum length 72 characters. It will be in the heading of the printout. When the problem is part of a superproblem, $PROBLEM is usually the first control record in a control stream, unless preceded by a $SUPER record (as a subproblem), or by a $SIZES record. A control stream can contain multiple $PROBLEM records, with each one marking the beginning of a problem specification.