Originally posted by: Guerlain

Hello I am new in the use of CPLEX  and am trying to become familiar with how it works and running into some road blocks.

I'm trying to build and run an Inventory Routing Problem.  I've a problem with these two equations as follows:

int Q[0..n] = ...;// Quatity of goods delivered to node j
int I = ...; // stock level in i

forall(j in 1..n) forall( k in 1..K) forall( t in 1..K)

the message of mistake is " (I) it's not a tab type"

Someone can help me to solve this prob and thks.

Hi,

this seems to be related to https://www.ibm.com/developerworks/community/forums/html/topic?id=ff54ff05-ad55-4176-9451-c8da4d24e2ca&ps=25

Can you attach your .mod and .dat ?

regards

Originally posted by: Guerlain

thks for the quick answer

attached the files

Hi,

in your constraint I is a 2D array wheras you declared I as a 1D array

int I[0..n] = ...; // niveau de stock a un sommet

So you should fix that

regards

Originally posted by: Guerlain

Hello

I already flow your advice and it's ok

I'm trying to solve a simple exemple with my model but it don't work till now if it possible to give me a hand to know the origine of the mistake

Here are model and data that you could improve.

Originally posted by: Guerlain

hello

maybe you'll find my question basic but I don't understand why you made the stock level on green like a comment

can you please give me the signification of this act to be more ready to understand cplex and the model and thks in advance

Hi,

I commented a lot to give you a starting point for repairing.

For the stock level, you may uncomment and get

forall(i in 1..n)forall (t in 1..T :t!=1)

I[i][t] == I[i][t-1] + sum(t in 1..T:t!=1)Q[i][t-1]- demand[i][t-1] ; // le niveau de stock du sommet visité

regards

Originally posted by: Guerlain

Hi

I flow your instructions and I have still a prob with the parameter of demand :

int demand[1..n][1..T] = ...;// la quantité de produit demandé par un sommet

demand = [0 ,22 ,30 ,37 ,31 ,29 ,21 ,42 ,13 ,12 ,20 ,15 ,25];

I think I have to add the part of the time in the data ([1..T]) ?

the error message is : Elément de données "0" inattendu pour "int[range][range]". 

best regards

Hi,

I attached what I have.

demand should be a 2D array in the .dat

regards