The name 'index_1' hides an outer declaration.

[SAS5]

Hi,  

I have a formulation with more than two indices, SAS produce an error:

for example:

con problem_con{<index_1, index_2> in two_indices}:  ...

SAS produced an error and told me:

"The name 'index_1' hides an outer declaration."

What does this mean and how do I get rid of this error?

Thank you!

[RobPratt · Accepted solution]

The message should just be a NOTE and not an ERROR.  It means that you have declared index_1 as a parameter and then later used it as a dummy index.  The following code yields the same behavior:

proc optmodel;
   num i;
   put ({i in 1..3});
quit;

To avoid the note, either omit the declaration or use a different dummy index.