Occbin matrix is singular to working precision

Dear professor,

I’m working on solving small open economy model with downward wage rigidity (Occbin).
It’s incomplete international market with debt elastic interest rate.
FNWR.mod (7.2 KB)
FNWR.m (1.0 KB)

But, it keeps saying ‘Matrix is singular to working precision’.

Could I ask some help??

One obvious issue is a syntax error. The name-tags of the Occbin equations need to be identical and not equal to the name of another equation. After that, there is still a singularity issue, which may have to do with the model setup. But that’s hard to tell.
FNWR.mod (7.2 KB)