How to generate an output file with individual parameters at each iteration

Dear NMusers, I would need to force the program to write on an output file the values of each parameters for each patient and at each iteration of the NONMEM algorithm. Something like the following if I have 5 patients: ITER ID Cl V ... 1 1 1.3 1.2 ... 1 2 ... 1 3 ... 1 4 ... 1 5 ... 2 1 ... 2 2 ... 2 3 ... ... ... ... Or simply, ID Cl V ... 1 1.3 1.2 ... 2 ... 3 ... 4 ... 5 ... 1 ... 2 ... 3 ... ... ... For FO (no individual parameters during the execution), I can use the INTER file, even if: - the format is not very well appropriated for what I want to do - the file is crached when excution ends Does anyone knwow if it is possible to do this in a simple way? Thanks for your help in this matter. Benjamin Benjamin Ribba, PhD Therapeutic Targeting in Oncology (EA3738) University Claude Bernard Lyon 1 Faculty of Medicine Lyon-Sud 165, chemin du grand revoyet 69921 Oullins cedex Tel: +33 4 26 23 59 57 / +33 6 66 06 15 21