Time 'T' in $Error

Dear NMuser, I would like to model a PD effect using a function which includes continuous time ‘ T ’. The PD Effect is coded in $Error. In general like this: $ERROR MyFunction = xxx + T PDEffect = Basline * MyFunction But ‘T’ cannot be used in $Error. I tried to code the function with ‘T’ in $DES and rename it to use it in $ERROR: $DES MyFunction = xxx + T $ERROR MyNewFunction = MyFunction PDEffect = Baseline * MyNewFunction but it didn’t worked (to rename was not permitted by NONMEM). Does anyone of you has an idea how to solve this problem? Thanks and best regards. Katrin Anke-Katrin Volz PhD Student Saarland University Clinical Pharmacy Campus C2 2 | Room 0.31 D- 66123 Saarbrücken mail [email protected] fon +49 [0]681 302 22 84 fax +49 [0]681 302 70 258 www.clinicalpharmacy.me