Dear Colleagues
I'm getting an error from NONMEM (7.5.1) when I try to run estimation using 
NUTS with multiple problems, with a really trivial model (one compartment, 1 
and 2 parameters estimated for the two problems)
The error is:
At line 83 of file
Fortran runtime error: Attempting to allocate already allocated variable 
'nuts_iparts3'

Runs fine with single problem and with 2 problems, runs fine with METH=COND, 
METH=BAYES or METH=IMPMAP
Seems to crash starting problem #2

The control file is below. Running Window 11, Gfortran

Also, if I'm FIXing a parameter (THETA(2) in problem 1), does it make sense to 
have a prior variance? NMTRAN doesn't complain, and it gives reasonable results.


$PROB BASE
$INPUT      AMT EVID OBNUM ID TIME DV COV1
$DATA       Model_dev1.csv IGNORE=@
$SUBS ADVAN1
$ABBR DERIV2=NO
$PK
  V = 1
  BASECL = THETA(1)
  CLFCOV = THETA(2)
  MU_1 = BASECL*(COV1/100)**CLFCOV
  CL=DEXP(MU_1+ETA(1))
  K = CL/V

$ERROR
  IPRED = F
  IOBS = IPRED *EXP(ERR(1))
  Y=IOBS

$THETA
 (-0.356)               ; THETA(1) CLEARANCE
  (0 FIX) ; THETA(2) CLEARANCE~COV1
$THETAP
 (-0.356, FIX)
 (0, FIX)

$THETAPV BLOCK(2) FIX VALUES(2,0)

$OMEGA
  (0.1) ;; ETA(1) CL

$OMEGAP  ;; OMEGA PRIOR
 (0.135 FIX)
$OMEGAPD  ;; OMEGA PRIOR DF
(5 FIX)

$SIGMA
  (0.05) ;; EPS(1)


$SIGMAP ;; SIGMA PRIOR
 (0.24 FIX)
$SIGMAPD FIX ;; SIGMA PRIOR DF
5 FIX
$EST METH=NUTS INTER CTYPE=0
$PROB FULL
$INPUT      AMT EVID OBNUM ID TIME DV COV1
$DATA Model_dev1.csv  IGNORE=@  REWIND
$THETA
 (-0.356)               ; THETA(1) CLEARANCE
  (-0.2877)           ; THETA(2) CLEARANCE~COV1
$THETAP
 (-0.356, FIX)
 (-0.2877, FIX)

$THETAPV BLOCK(2) FIX VALUES(2,0)

$OMEGA
  (0.1) ;; ETA(1) CL

$OMEGAP  ;; OMEGA PRIOR
 (0.135 FIX)
$OMEGAPD  ;; OMEGA PRIOR DF
(5 FIX)

$SIGMA
  (0.05) ;; EPS(1)


$SIGMAP ;; SIGMA PRIOR
 (0.24 FIX)
$SIGMAPD FIX ;; SIGMA PRIOR DF
5 FIX
$EST METH=NUTS INTER CTYPE=0


An ideas?

Thanks


Mark Sale M.D.
Vice President
Integrated Drug Development
[email protected]
Remote-Forestville CA
Office Hours 9 AM - 5 PM Eastern Time
+1 302-516-1684
www.certara.com
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