Limitation of CHOOSE command

[veeblefester]

I/O command CHOOSE. Page 549 of the Prime User Guide.

Up to and including "item14" works.

...,"itemn" is wrong!

With "item15" and beyond you get a Syntax Error.

Someone please prove me wrong.

I need "item1" thru "item20".

It is looking like I will have to write code for a CHOOSE 1 thru 10 and a CHOOSE 11 thru 20. That would not be good programming.

Thanks in advance for any help.