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RE: $ABBR REPLACE Limitations?

From: Bauer, Robert <Robert.Bauer>
Date: Wed, 24 Jan 2018 05:43:05 +0000

This bug has been fixed since NONMEM 7.4

Bug #1, nm730_bug_list.pdf in
Two variables with names longer than six characters, and identical in the first six characters, defined in $PK, and used in $DES, will be seen as the same variable. Use variable names that differ in the first six characters. This occurs in NONMEM 7.1.0, 7.1.2, 7.2.0, and 7.3.0. A workaround is to move all assignment statements for variables whose first 6 characters match to $DES.

Robert J. Bauer, Ph.D.
Senior Director
Pharmacometrics R&D
ICON Early Phase
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From: owner-nmusers
Sent: Tuesday, January 23, 2018 4:40 PM
To: Luann Phillips
Cc: nmusers
Subject: RE: [NMusers] $ABBR REPLACE Limitations?

Hi Luann,

I’m not having similar problems with other parameters with >6 characters. I had a similar issue with ALAG1, so I think that there are limitations on what types of variables you can remap. (Perhaps Allison or Bob could confirm?)



From: Luann Phillips [mailto:luann
Sent: Tuesday, January 23, 2018 3:51 PM
To: Bill Denney <wdenney
Cc: nmusers <nmusers nmusers
Subject: Re: [NMusers] $ABBR REPLACE Limitations?


I know at one time NM had a bug (haven't checked to see if it has been fixed) that would cause variables with the first 6 characters the same to be interpreted as the same variable even when later characters differed. I wonder if this is a similar issue?
Have you tried a shorter variable name, such as FCD1GUT=F1?

Just a thought,

From: "Bill Denney" <wdenney com<mailto:wdenney
To: "nmusers" <nmusers
Sent: Tuesday, January 23, 2018 2:15:32 PM
Subject: [NMusers] $ABBR REPLACE Limitations?


I’m working in NONMEM 7.4.1 with a model where I need to track 4 drugs simultaneously. To increase the model quality, I’m making heavy use of $ABBR REPLACE to keep track of THETA, ETA, and CMT numbers. I traced an issue with my model where there was no gradient on a bioavailability term to the fact that this substitution didn’t seem to be working:




FCMTD1GUT didn’t seem to be effectively replaced to F1, so the bioavailability parameters had no effect. When I changed it to just directly name F1, it worked as expected.


F1 = THETA(1)

It’s not obvious from the $ABBR REPLACE section of the manual that this is a limitation of $ABBR REPLACE. Is this an issue or am I missing something?



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Received on Wed Jan 24 2018 - 00:43:05 EST

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