Documentation issue in Tutorial Example 3: code does not trigger Error 170

GAMS
1

Hello,

I noticed an apparent inconsistency in Example 3 of the “Error Messages” section of the GAMS 54 tutorial:

The text says that Seattle is spelled differently in the table than in the set declaration and that this produces Error 170, “Domain violation for element.” However, the code currently shown uses seattle in both places:

sets
    i   canning plants / seattle, san-diego /
    j   markets        / new-york, chicago, topeka /;

table d(i,j) distance in thousand of miles
             new-york  chicago  topeka
    seattle      2.5      1.7      1.8
    san-diego    2.5      1.8      1.4;

Because seattle matches the element declared in set i, the displayed code should not produce Error 170. To demonstrate the intended domain violation, the first table row presumably should be misspelled as seatle (with one “t”):

    seatle       2.5      1.7      1.8

Could you please correct the example so that the code matches the explanation and displayed error message?

Thank you.

2

Hi sanghunkang, welcome to the GAMS forum! And thank you very much for pointing that out. This error slipped in last year while I was correcting typos in the documentation. However, since the typo here was intentional, I actually made the documentation worse in this case. This will be fixed in the next release. Thanks again.

3

Thanks for checking! Glad I caught it.