I've found some threads that confirm the problem I'm having but none that provide a resolution.

Why doesn't this work:

HSERIN 1, [STR DAT\800\"@"]

But this does?

HSERIN 1, [STR DAT\255\"@"]

Is the maximum input for an array 255? The only way I can make it work right now is:

HSERIN 1, [STR DAT1\255\"@", STR DAT2\255\"@", STR DAT3\255\"@", STR DAT4\255\"@"]