MERLIN-Expo is a flexible tool which allows you to do things in the order you prefer. It has powerful features such as probabilistic simulations and sensitivity analysis. The models are dynamic and often sensitive to input provided by the user. All of these things make it more or less inevitable that you will sooner or later run into trouble.
The troubleshooting pages are organised into the following categories:
Error messages - For errors/warnings that must be taken care of before a simulation starts, for messages during a simulation as well as fixes to some common simulation problems.
Simulation issues - Guides for handling problems with simulations and unexpected simulation results.
General problems - For questions related to the overall usage of the tool.