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- Msg 103 is 19 line(s) on 02/12/88 from JAY SAGE
- to BRIDGER MITCHELL about BGII PROBLEM WITH FLOW CONTROL
-
- Rick Charnes first pointed out and I confirmed that some flow control
- tests that work under ZCPR3 do not work under BackGrounder. Specifically,
- these are the tests that refer to disk files, such as IF EXIST, IF EMPTY,
- IF SYS, IF RO, and so on.
-
- This problem was causing me particular grief recently as I tried to
- implement an alias to use SAVSTAMP. File-existence tests kept giving the
- wrong result. I have finally figured out what is causing the trouble,
- and looking back I should have been able to figure this out long ago; I
- had seen several clues. First, IF.COM, when invoked directly (say by
- renaming if to COMIF.COM and running COMIF EX FN.FT;IFQ,FI) always gave
- the correct answer. The problem only occurred when control was passed
- from the FCP module. The second clue I had was that under BGii, there
- were occasional strange accesses to one of my floppy drives. Finally
- today I noticed that when I entered "IF EX FN.FT" the light on my floppy
- drive B kept flashing even though I was on ramdrive M:. The answer is
- that BGii is losing track of the logged-in directory in the process of
- calling on the FCP module. By entering "IF EX M0:FN.FT" I can get the
- test to return the correct answer.
-
- MSG # [last msg = 300] : or COMMAND (? for help) ?