Decision Optimization

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)

you can find the runnable code in the attachment.

------------------------------
Vahid Mahmoodian
------------------------------

#DecisionOptimization

Which version of docplex and cplex are you running?

------------------------------
Vincent Beraudier
------------------------------

Original Message:
Sent: Sat April 17, 2021 02:23 AM
From: Vahid Mahmoodian
Subject: Assertion error in remove_constraint of docplex

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)

you can find the runnable code in the attachment.

------------------------------
Vahid Mahmoodian
------------------------------

#DecisionOptimization

I was using version 2.14.0 and you are right. It is fixed in the newer versions. Thank you!

------------------------------
Vahid Mahmoodian
------------------------------

Original Message:
Sent: Mon April 19, 2021 10:35 AM
From: Vincent Beraudier
Subject: Assertion error in remove_constraint of docplex

Which version of docplex and cplex are you running?

------------------------------
Vincent Beraudier

Original Message:
Sent: Sat April 17, 2021 02:23 AM
From: Vahid Mahmoodian
Subject: Assertion error in remove_constraint of docplex

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)

you can find the runnable code in the attachment.

------------------------------
Vahid Mahmoodian
------------------------------

#DecisionOptimization