I have used remove_constraint method of docplex before but for a specific model it keep giving me the following assertion error that I have no idea how to fix:

assert len(cpx_terms) == len(mdl_terms)

AssertionError

Here is a snippet of my code:

# Obj 2

Obj2_ptr = MODEL.add_constraint(Y[1] ==

T*sum(sum(ins.M_r[r]*ins.FF_r[r]*D_rij[(r,i,j)] for (i,j) in ins.AA_r[r]) for r in ins.RR))

# Obj 1

a = MODEL.add_constraint(Y[0] == ins.C_inv*(sum(Y_i[i] for i in ins.NN)

+ sum(Z_i[i]-sum(X_ij[(w,i)] for w in ins.NN if (w,i) in ins.AA) for i in ins.NN_s) )

+ ins.C_con*ins.l*sum(X_ij[i] for i in ins.AA) )

MODEL.remove_constraint(Obj2_ptr)

The assertion is more for data consistency check. Please post a complete and runnable sample in Data Science Community https://community.ibm.com/community/user/datascience/communities/community-home/digestviewer?communitykey=ab7de0fd-6f43-47a9-8261-33578a231bb7&tab=digestviewer