> so BADNAME!! actually exists. Is a *PGM (type/subtype 0201) Well, in a sense :-) The address 16C5BF5032000000 is the address of the MI pgm itself (the one this MI code is in). If you dump the MI pgm with SST, you'll see that the address 16C5BF5032001550 is in the "External object list table". What "exists" is a byte string in the MI pgm, not a pgm object named "BADNAME!!". --Dave Leif Svalgaard wrote: > From: <Gene_Gaunt/ReviewWorks@reviewworks.com> > > > Seems CMPPTRT returns a "not equal" condition when it compares a null value > > to an unresolved system pointer containing an invalid initial value. Why? > > Shouldn't this situation return an "equal" condition? In the following > > little program at the breakpoint, FLAG1 has value "0" while FLAG2 has value > > "1". Shouldn't FLAG1 have value "1" too, since pointer P and pointer Q > > are both null and both will fail in a CALLX operand 1? > > > > DCL SYSPTR P AUTO INIT("BADNAME!!"); > > DCL SYSPTR Q AUTO; > > DCL DD FLAG1 AUTO CHAR(1); > > DCL DD FLAG2 AUTO CHAR(1); > > > > CMPPTRT(I) P, * / EQ(FLAG1); /* becomes "0" */ > > CMPPTRT(I) Q, * / EQ(FLAG2); /* becomes "1" */ > > BRK "LOOK"; > > Gene if you look at the pointers you'll see they are (on my system, > addresses will be different on yours): > > 200000000000000016C5BF5032001550 ; P > 00000000000000000000000000000000 ; Q > > so P actually has a value. If you go to the address you'll see: > > Address 16C5BF5032 001550 > 001550 00504080 00000000 001E0000 00000001 ·& Ř············ > 001560 0201C2C1 C4D5C1D4 C55A5A40 40404040 ··BADNAME!! > 001570 40404040 40404040 40404040 40404040 > > so BADNAME!! actually exists. Is a *PGM (type/subtype 0201) > so no wonder you get the result you got. +--- | This is the MI Programmers Mailing List! | To submit a new message, send your mail to MI400@midrange.com. | To subscribe to this list send email to MI400-SUB@midrange.com. | To unsubscribe from this list send email to MI400-UNSUB@midrange.com. | Questions should be directed to the list owner/operator: firstname.lastname@example.org +---
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