# Bad arithmetic conversion when assigning a stem var

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Ajay Baghel

Active User

Joined: 25 Apr 2007
Posts: 206
Location: Bangalore

 Posted: Tue Nov 26, 2019 11:29 am I am reading file into stem var inrec. "execio * diskr indd (stem inrec. finis" last-var = inrec.1 The above assignment statement is failing with bad arithmetic conversion error. I am able to see value 191003 correctly when I display inrec.1 using say. Pls advise
prino
Warnings : 1

Senior Member

Joined: 07 Feb 2009
Posts: 1241
Location: Vilnius, Lithuania

 Posted: Tue Nov 26, 2019 2:05 pm Show a trace, straight assignments in REXX cannot cause this error!
Willy Jensen

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Joined: 01 Sep 2015
Posts: 416
Location: Denmark

 Posted: Tue Nov 26, 2019 3:47 pm 'last-var = inrec.1 ' means subtract value of var=inrec.1 (which would evaluate to 0 or 1) from value of last. Change the minus sign to something else.
Willy Jensen

Active User

Joined: 01 Sep 2015
Posts: 416
Location: Denmark

 Posted: Tue Nov 26, 2019 5:42 pm Sorry, my explanation was wrong - but it is caused by the minus sign in the varname.
sergeyken

Active Member

Joined: 29 Apr 2008
Posts: 933
Location: Maryland

Posted: Tue Nov 26, 2019 7:12 pm

 Willy Jensen wrote: 'last-var = inrec.1 ' means subtract value of var=inrec.1 (which would evaluate to 0 or 1) from value of last.

Even worse:

The expression last-var = inrec.1
is in fact considered as
last - (var = inrec.1)
where the comparison (var = inrec.1) is always valid; it produces either 1, or 0 (with the highest probability of 0)

Next, the current value of last is considered:

1) when last is not defined, the value is 'LAST'
An attempt to calculate 'LAST' - 1 or 'LAST' - 0 would cause "bad arithmetic conversion"

2) when last is defined as non-numeric, like last = 'Hello!', then the same result as #1: "bad arithmetic conversion"

3) when last is defined as numeric, like last = 12345, then result of subtraction would be either 12345, or 12344, and then this numeric value would tried to be considered as invalid REXX expression, or TSO command, and would cause another error.
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