Hi Alex,
The version of PyMC3 is 3.8 and Theano is 1.0.4. The error appears when I compile the model.
Exception: ("Compilation failed (return status=1): /Users/user/.theano/compiledir_macOS-10.14.6-x86_64-i386-64bit-i386-3.8.5-64/tmpbygutbi4/mod.cpp:510:27:
error: non-constant-expression cannot be narrowed from type 'npy_intp' (aka 'long') to 'int' in initializer list [-Wc++11-narrowing]. int init_totals[2] = {V3_n0, V3_n1};.
^~~~~. /Users/user/.theano/compiledir_macOS-10.14.6-x86_64-i386-64bit-i386-3.8.5-64/tmpbygutbi4/mod.cpp:510:27:
note: insert an explicit cast to silence this issue. int init_totals[2] = {V3_n0, V3_n1};.
Btw, can you expand on the more informative hyperpriors comment?