Try help attrib OR attrib /? to see if you get the message you cite.
And if, perchance, glosomin.exe and data.in are on some drive other than C:, the message should have been to the effect "(filename) not found" or some variation thereof. But attrib had been an M$ command from some early, pre-Windows version of DOS.
In reply to Re^3: system subroutine is ignored
by ww
in thread system subroutine is ignored
by Njoud
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