topic INPUT TEXT I/O will never be -1 in GDL

INPUT TEXT I/O will never be -1

rudl — Tue, 09 Dec 2025 17:55:51 GMT

Read a lines with Text IO

Input will never be -1 -> infinite loop , no End of file

Part of the script below

aii = OPEN ("TEXT",i_pathnew,"SEPARATOR = '\n',MODE = RO,NEWLINE = LF,FULLPATH") REPEAT IF y # -1 THEN ! BUG will never be -1 , no EOF y = INPUT (aii,i,1,a_impb[j][1]) : i=i+1 y = INPUT (aii,i,1,a_impb[j][2]) : i=i+1 y = INPUT (aii,i,1,a_impb[j][3]) : i=i+1 ENDIF j = j+1 IF i > 40000 THEN PRINT "error no EOF" END ENDIF UNTIL y = -1 ! ( OR i > 20000) quickfix to limit

Re: INPUT TEXT I/O will never be -1

rudl — Sat, 27 Dec 2025 11:51:08 GMT

Well there seems to be more that doesn't work with the text I/O

and it might be related:

IT finds and reads the file once it seems.
But still throws an error "can't find file" for every view I guess: sections / elevations...

My guess is closing the channel doesn't work?

Maybe i should not have everything in master or try to prevent executing/opening the chanel that often somehow.

But still there is something wrong.

This is on AC 27

Re: INPUT TEXT I/O will never be -1

BerndSchwarzenbacher — Wed, 14 Jan 2026 11:07:26 GMT

Hi rudl,

One issue might be, that you could read past the EOF since you read 3 times before checking if y = -1.
But that's just a quick observation. Haven't tested it.

Best regards,
Bernd

Betreff: INPUT TEXT I/O will never be -1

Jochen Suehlo — Wed, 14 Jan 2026 19:11:48 GMT

Try to use the WHILE .. DO.. ENDWHILE instead of REPEAT, because WHILE checks the condition before it runs through the loop, REPEAT checks it after.
I always used the examples in the GDL Cookbook 3 as a template for my own routines and never had the issues you described.