APEX 1501 Buffer errors

[Maya Struzak]

Hello,

I am using APEX1501 to simulate a simple soybean field (one subarea) and am trying to add a grass buffer as a downstream subarea. I followed the guidance in the APEX conservation practice documentation to construct a grass filter strip, but my simulation crashes midway through the first year without any error messages. 

The model runs long enough to print the routing scheme in the .OUT file (screenshot and file attached), which looks reasonable, leading me to believe it is not a routing-format issue. Both the field and buffer subareas run successfully on their own, but the run fails when they are combined. 

For reference, both subareas use the same soil, the buffer has a simple operation schedule (plant range grass on Jan 1 of the first year, kill at the end of simulation), and I've confirmed CHL = RCHL for the field and RCHL < CHL for the buffer. 

Has anyone else encountered similar issues with a two-subarea setup? Any insights would be greatly appreciated! I've attached my .OUT and .SUB files below.

Thanks!

Maya