ADVAN5 Problem

From: Jill Fiedler-Kelly Date: March 29, 1994 technical Source: phor.com
We recently ran into some difficulty running ADVAN5 with a simple two compartment model. This data terminates successfully under ADVAN4. The error message we consistently get, although with different ID numbers depending on the initial estimates, is 'NUMERICAL DIFFICULTIES OBTAINING THE SOLUTION'. Data simulated (at the same time points as the original file) with ADVAN4 also terminate in the same error running under ADVAN5. I was wondering if anyone else has had similar experiences or knows if there is any reason to expect that this might happen? Thanks for any help you can provide. See topic 17