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All: I have a control stream that runs okay which involves differential equations. When I requested an output table containing thetas I got this error. , " The characters in error are: Theta 479 This item is not listed in module NMPRD4 and may not be displayed." I have searched the archives and came across a post from 2011 which discussed the relationship of PREDPP to this module NMPRD4. Part of the post stated, "Every variable displayed via $TABLE has the value that was calculated by the last call to DES with the current event record. This is not a design decision; it is inevitable. Values created by PREDPP for display by NONMEM are stored in a common area (formerly COMMON NMPRD4; now MODULE NMPRD4)." However there was insufficient discussion for me to figure out how to resolve this issue. I would be very appreciative if someone with experience with this problem could advise me how it can be corrected so that I can generate a table containing my final Theta and Eta values from Nonmem 73? Thanks, Andre Andre Jackson [email protected]