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"Any problem in computer science can be solved by adding one more level of indirection."

So, we can have a main line with just a single CALLP to the "real main" procedure. Since a procedure can call itself recursively, this problem is solved. Example:

H DftActGrp(*No) ActGrp('QILE') D realMain PR D nbr 15P 5 C *entry plist C parm number 15 5
C callP realMain (number) C eval *inlr = *on C return P realMain B D PI D nbr 15P 5 C eval nbr = nbr + 1 C if nbr < 65 C callP realMain (nbr) C endif P E

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