Hello,
I am trying to use AMPL extended functions in my model. I have the following lines in my model:
load amplgsl.dll;
function gsl_cdf_beta_P;
Since the problem is nonlinear, I need to use a global optimizer such as BARON, LINDO Global, LGO, or Couenne. But none seems to be able to call these functions. I tried following the steps listed in these previous posts:
( I tried downloading an older version of the amplgsl.dll and set the ampl_funclibs to the location of amplgsl.dll)
But none seemed to work and I get the following error messages respectively, for the aforementioned solvers:
BARON does not support operation function call
BARON 25.8.5 (2025.08.05): operation not supported by BARON
BARON 25.8.5 (2025.08.05): maxtime=3600
Reading C:\Users\pelin\AppData\Local\Temp\at18472.nl in NL format
Bad NL format
Errorcode=2029: Specified feature is not yet supported or not compatible with the model type.
exit value 1
LGO: timelim=3600
function gsl_cdf_beta_P not available
exit value 4
Couenne 0.5.8 – an Open-Source solver for Mixed Integer Nonlinear Optimization
Mailing list: couenne@list.coin-or.org
Instructions: Couenne, a solver for non-convex MINLP problems
couenne: max_cpu_time=3600
exit value 18446744072635810825
I would really appreciate any help on how to proceed.
Thank you!
Pelin