Subject: Request for Assistance — Simulation Issue & Poor Model

[Farhan Farooq]

Dear All,

I hope this message finds you well. I am writing to ask for your guidance on a problem I have encountered while running my simulations.

I am currently working with SUFI-2, and I have run into the following issues:

1. Echo file problem: I am receiving an echo file error/issue that I have not been able to resolve. I have checked the standard log files, but the cause is unclear to me.
2. Simulation no. 2 did not run: The second simulation in my sequence failed to execute entirely. I am unsure whether this is linked to the echo file issue or if it stems from a separate input or configuration problem.
3. Nash–Sutcliffe efficiency (NSE) = –0.7: For the simulations that did complete, the NSE value is approximately –0.7, which indicates very poor model performance. I would greatly appreciate any advice on how to diagnose and improve this.

Would you be available to help me troubleshoot these issues? I can share the input files, echo logs, and any other details you might need.

Thank you very much for your time and support.

Best regards,