fortran error when using two segments/tribs

[GPhillips]

I am running a model with two segments, a main stem and a tribuatry.  Runs great with only main stem but when I add the trib i get this:  "unexpected error occurred when executing q2k fortran"  My reach numbering all seems right, as does HW reach designation.   Any ideas on what the issue is?

Thx,

Greg

[GPhillips]

I figured it out!  the model is sensitive to number of elements in the main stem reach where the confluecne with the tribuatary occurs.  Has to be only one element.  So I had to add a special junction/confluence reach in order to have multiple elements calcualte in that segment of the model.