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got a strange read error

 
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KennyT



Joined: 02 Aug 2005
Posts: 317

PostPosted: Wed Feb 15, 2017 7:51 pm    Post subject: got a strange read error Reply with quote

I'm getting a floating point error, with the following line:

Code:
READ (NU, REC=IREC, iostat=IOS, err=9000) IVAL, NXTREC, LSTREC, ICVER


which seems strange because it doesn't go to the err= line and the 4 variables that it's reading are all INTs!

any ideas?


K
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 7916
Location: Salford, UK

PostPosted: Wed Feb 15, 2017 9:47 pm    Post subject: Reply with quote

I think that the err return would be for an error in the data whereas this appears to be something to do with the type of the variables.

Are you sure that they are all integers?
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KennyT



Joined: 02 Aug 2005
Posts: 317

PostPosted: Wed Feb 15, 2017 10:48 pm    Post subject: Reply with quote

i've emailed you a couple of screen grabs from SDBG...

let me know if you need anything else.

K
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mecej4



Joined: 31 Oct 2006
Posts: 1885

PostPosted: Thu Feb 16, 2017 6:47 pm    Post subject: Reply with quote

My guess is that you have project settings or compiler options that cause the integers being read to be 8-byte integers, since FTN95 processes 8-byte integers using X87 instructions and the X87 register stack ST0-7.
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KennyT



Joined: 02 Aug 2005
Posts: 317

PostPosted: Fri Feb 17, 2017 4:58 pm    Post subject: Reply with quote

thanks, but under SDBG i can see that the variables being read are all INT*4s and the binary data being read are all valid (e.g. hex 77), so it remains a mystery for now.

Anyway, i've sent the data and a debuggable app to Silverfrost, so i'll wait and see what they find.

K
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