forums.silverfrost.com

eugenea · Joined: 14 May 2007 Posts: 2

I have a program that used to run OK with UNIX compilers, but I am having some problems moving it to Windows using Silverfrost F95.

I've ironed out most of the errors - they were my fault (my previous compilers were too permissive and allowed some bad practices; Silverfrost is more strict, and justly so).

But there is one last (hopefully!) problem I just cannot solve. The software does not want to print to screen from subroutines (it does from the core program), saying "error 94: unit neither has been OPENed nor preconnected".

I don't want to disable screen output; I need to monitor that things are OK. How can I open or preconnect screen output?

PaulLaidler · Posted: Wed May 16, 2007 4:34 pm Post subject:

You do not need to open or preconnect.
Just use PRINT or WRITE(2, ...) or WRITE(6, ....)

eugenea · Joined: 14 May 2007 Posts: 2

PaulLaidler · Posted: Wed May 16, 2007 6:47 pm Post subject:

Can you post a small program here to illustrate the problem?

IanLambley · Joined: 17 Dec 2006 Posts: 490 Location: Sunderland

Try avoiding low unit numbers for your normal i/o, if you open a file with unit 1, 2 .. 6 etc, then this may overrule the standard preconnections. Closing them afterwards may not restore the preconnections. I always start my i/o unit numbers at 10.

Just a suggestion.

Ian

JohnCampbell · Joined: 16 Feb 2006 Posts: 2554 Location: Sydney

To write to the screen, you can simply use the following format defined or free format, or any expansion of these.

write (*,1001) 'string and number ',i
1001 format (a,i0)

write (*,*) 'string and number ',i

I use these in both a cmd.exe DOS box or clearwin+, without any problems.

You may also use units 1 or 6, as these are the default output.
write (1,1001) 'string and number ',i

If these are not working, make sure you don't open a file on units 1-7, in case of any legacy unit issues. I start opening files from unit 11.

I hope this relates to your problem.