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Forum Index : Microcontroller and PC projects : error with "on error skip"
| Author | Message | ||||
| robert.rozee Guru  Joined: 31/12/2012 Location: New ZealandPosts: 2294 |
i believe the following two pieces of code should work - they don't: On error skip For I = 1 To 28 SetPin I, DOUT Print "pin " I " configured" Next I > run [3] SetPin I, DOUT Error: Pin 1 is invalid > and On error ignore For I = 1 To 28 SetPin I, DOUT Print "pin " I " configured" Next I > run pin 0 configured > cheers, rob :-) |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2294 |
looks like part of the problem is that RAM is being cleared after the error occurs: On error ignore A$="some text" Memory SetPin 1, DOUT Print"----------------" Memory > run Flash: 1K ( 1%) Program (7 lines) 59K (99%) Free RAM: 1K ( 1%) 1 Variable 0K ( 0%) General 49K (99%) Free ---------------- Flash: 1K ( 1%) Program (7 lines) 59K (99%) Free RAM: 0K ( 0%) 0 Variables 0K ( 0%) General 50K (100%) Free > cheers, rob :-) |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2294 |
looks like my use of ON ERROR SKIP was incorrect. correcting the use (placing it just before the SETPIN line) reveals the same problem as with IGNORE, in that RAM is cleared. rob :-) |
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9078 |
I am seeing this error too, whenever I try to use ON ERROR SKIP. Following the initial error, I also am not getting any response from mm.errmsg$:  MM.ERRMSG$ is suddenly "Invalid syntax", when it was perfectly valid BEFORE the on error skip error comes up. The MM.ERRNO value is also wrong, but Geoff knows about that one. I'm using 5.03B10. Smoke makes things work. When the smoke gets out, it stops! |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 3677 |
Maybe the syntax changed to ON ERROR IGNORE John |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9078 |
I need to correct the above - it was actually correct in terms of my asking MMBASIC in immediate mode(command prompt) what mm.errmsg$ was - it was indeed "Invalid syntax" - that was the error message last reported, so my asking for ? mm.errmsg$ and it reporting back "Invalid syntax." was actually correct in terms of the error message itself. The message is wrong for the On Error Skip command, but the actual message text as held by mm.errmsg$ is correct, and asking to print that at the command prompt is actually the correct result for that command, if you see what I mean..... Smoke makes things work. When the smoke gets out, it stops! |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9078 |
UPDATE: On Error Skip MUST specify the number of lines to ignore errors in - see B10 manual, page 63. Although the manual says that if you DON'T specify a number, it will default to one, this causes the error. If I use On Error Skip 1 for ignore any errors in the next line where I try to open the file, it works perfectly, and even the mm.errno number is also then correct - 6 - which is file not found, which is exactly right. The bug would seem to be connected to On Error Skip if you DON'T specify a number to skip, and MMBASIC is supposed to ASSUME one, but does not, and this is upsetting it. Rob - I would be extremely interested to hear from you if this also fixes your issue with the same command. Smoke makes things work. When the smoke gets out, it stops! |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2294 |
nope, still fails: For I = 1 To 28 On error skip 1 SetPin I, DOUT Print "pin " I " configured" Next I > run pin 0 configured [5] Next I Error: Cannot find a matching FOR > the problem is that when the error occurs, all variables, etc are lost. in the above example I reverts to zero and the for loop stack is cleared. cheers, rob :-) |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9078 |
What version of MMBASIC are you using, Rob? B10 I guess? Smoke makes things work. When the smoke gets out, it stops! |
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Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3167 |
I think that we have two bugs here and hopefully I have hunted both of them down. The first - clearing all variables. When the error occurs in a subroutine the ERROR SKIP or IGNORE works OK but if it happens in the main program the variable table will be cleared (thanks Rob for finding that one). The second - working with files. If the error occurs when accessing the SD card on the MM+ the MM.ERRNO and MM.ERRMSG$ variables got confused (thanks Grogster for finding that one). I have fixed both of these in the final version of 5.3 (due out in a day or two). Geoff Geoff Graham - http://geoffg.net |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2294 |
excellent news, although there are (currently) even problems if used in a subroutine: foobar End Sub foobar On error ignore For I = 1 To 28 SetPin I, DOUT Print "pin " I " configured" Next I End Sub > run pin 1 configured > also, if I is declared with LOCAL it is cleared. cheers, rob :-) |
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