How can I solve this error? (There is no specific location given)

"Exception from IBM ILOG Concert: excel: range has a bad size. it must be only 1 line or 1 row."

I read my data from Excel. I already wrote my whole code while sheetreading matrices with multiple rows or columns. Never had a problem, now all of a sudden, this pops up as a problem. The last piece of code I did was this

forall (d in decisions, o in orders, p in pieces, m in modes) (varcost[d] == (sum (o in orders, p in pieces, m in modes) volume[o]*cvarcalm[m]*distance[p]*z[d,o,p,m]));

so my best guess is that this has something to do with it.

You can find my full code here:

https://1drv.ms/w/s!AmJYk6YmU7wu7RgwYjV9U-CqAF-d?e=B9hqbV

Hi

as I wrote in

https://stackoverflow.com/questions/64845630/exception-from-ibm-ilog-concert-excel-range-has-a-bad-size-it-must-be-only-1/64856480?r=SearchResults#64856480

can you attach all files so that Other Users could try ?

forall (d in decisions, o in orders, p in pieces, m in modes) (varcost[d] == (sum (o in orders, p in pieces, m in modes) volume[o]*cvarcalm[m]*distance[p]*z[d,o,p,m]));