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A mystery   Message List  
Reply | Forward Message #3080 of 3238 |
Re: [nsbasic-desktop] A mystery

Hi Jim,
you're not declaring any variables you use in your sub, so they should be global or the SUB won't work. I suggest you put "option explicit" right at the beginning of your program and DIM all variables.
Remember that all variables are local and are known only inside the sub or function where they are declared (dim) or assigned a value!  
Kind regards
Thomas
Von meinem iPhone gesendet

Am 11.07.2009 um 22:49 schrieb "cschuchert" <cschuchert@...>:

Something isn't right here and hope someone might have an insight into what may be causing it. It could be a bug in NSB Desktop, itself, or something I have done but my lack of expertise prevents my seeing it. I reported a similar situation in this forum and the response was it must be in the code and keep looking. Here is what is happening occasionally but not always:

I call a sub in a module from my code. When it gets to that code line, it complains there is a type mismatch. I put a debugging msgbox at the beginning of the sub and try again but it never gets that far, like it doesn't think the sub is there. It stops at the code line and gives the mismatch error. I realize that if the sub is not in the module, that will happen but that isn't the case. The sub is there. A few days ago I posed the question about "is there a limit to number of subs allowed in a module" to which the reply was there is not. Nevertheless, I removed the sub, created a new module and pasted it to the new one. It then found the sub and all was ok. Now it happened again and my first solution doesn't work. Consider this:

Sub Displayinverse
If intAZ Then
strNS = ""
strEW = ""
End If
pintcntr = InStr(strFrpoint, "*")
plngPtfrom = Int(Mid(strFrpoint, 1, pintcntr - 1))
plngPtto = Int(Mid(strFrpoint, pintcntr + 1))
pstrBrng = strNS & strDeg & Chr(176) & strMin & Chr(39) & strSec & Chr(34) & strEW
pstrDist = FormatNumber(dblDistance, sDecPl)
txtembedDisplay.Text = txtembeddisplay.Text & plngPtfrom & " " & _
pstrbrng & " " & pstrdist & vbCrLf
End Sub

I placed this sub in Module 1 and tried to call it from the following code:
Sub lenfrpoint1()
continueinverse
If intAZ Then dblBearingdms = dblBearing
If dblBearing = 90 Or dblBearing = 270 Then dblBearingdms = 90
converttodms
displayinverse `the one I was calling
End Sub

It gave the `type mismatch' message

I deleted it from Module 1 and put it in Module 2 with the same results.

Then I copied the code within `displayinverse' and substituted if for the sub, like this:
Sub lenfrpoint1()
continueinverse
If intAZ Then dblBearingdms = dblBearing
If dblBearing = 90 Or dblBearing = 270 Then dblBearingdms = 90
converttodms
If intAZ Then
strNS = ""
strEW = ""
End If
pintcntr = InStr(strFrpoint, "*")
plngPtfrom = Int(Mid(strFrpoint, 1, pintcntr - 1))
plngPtto = Int(Mid(strFrpoint, pintcntr + 1))
pstrBrng = strNS & strDeg & Chr(176) & strMin & Chr(39) & strSec & Chr(34) & strEW
pstrDist = FormatNumber(dblDistance, sDecPl)
txtembedDisplay.Text = txtembeddisplay.Text & plngPtfrom & " " & _
pstrbrng & " " & pstrdist & vbCrLf
End Sub

That works fine. Now what in the world could be causing the `type mismatch' when calling the sub from the code? This sub (displayinverse) is not many lines of code but I have others with a great number of lines and don't want to paste them. Could it be the copying and pasting operation from VB to NSB? I also have done the same thing from the CE version and believe the first problem was from one those pastings. A real conundrum!

I am also finding that using the variant type may be causing problems when comparing values. My if...then clauses using > and < in comparing values gave me bad results because it apparently wasn't comparing numbers with what it may have considered strings. As soon as I placed `Int' in front of the value (which I thought the variant type recognized as a double) it worked but not in all cases.

I may kick myself when I discover how simple the problem presented really is so I look forward to that kick. Thanks for reading through this long post.

Jim




Sat Jul 11, 2009 10:22 pm

computerhusky
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Message #3080 of 3238 |
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Something isn't right here and hope someone might have an insight into what may be causing it. It could be a bug in NSB Desktop, itself, or something I have...
cschuchert
Offline Send Email
Jul 11, 2009
8:50 pm

Hi Jim, you're not declaring any variables you use in your sub, so they should be global or the SUB won't work. I suggest you put "option explicit" right at...
computerhusky
Offline Send Email
Jul 11, 2009
10:23 pm

Thomas, Thank you for your reply. However, the variables are all declared as globals if you are talking about the first situation (type mismatch when calling a...
cschuchert
Offline Send Email
Jul 11, 2009
11:16 pm

Hi Jim, if you say you tried to put a msgbox statement inside your sub but it never gets that far, does that mean the call of the sub fails? If it gets a type...
Thomas Gruber
computerhusky
Offline Send Email
Jul 12, 2009
9:33 am

I'm with Thomas on this one. You didn't specify the line referenced in your error message, but based upon your description, it sounds as if the app is failing...
skysensor
Offline Send Email
Jul 12, 2009
1:16 pm

It's almost certainly something in your code. If MsgBox statement don't help you isolate the problem, try reducing your program to the shortest version that...
George Henne
ghenne
Offline Send Email
Jul 12, 2009
10:42 am

George, Mark and Thomas, Thank you very much for your advice. The error message said "type mismatch displayinverse" so I knew exactly where to look. Everything...
cschuchert
Offline Send Email
Jul 12, 2009
3:52 pm

Hi Jim, very mysterious, but I'm glad to hear that your program is working now. If something similar happens again, I'm sure someone in this group, including...
Thomas Gruber
computerhusky
Offline Send Email
Jul 12, 2009
4:27 pm

I actually used to have that problem in VB from time to time. I'd actually have to copy the code from a module, create a new module, and paste the code into...
Styskul
Offline Send Email
Jul 12, 2009
8:56 pm

Thanks, everyone. It never happened to me in VB but at least I know I'm not imagining things. There are other weird things going on but I'll save those for...
cschuchert
Offline Send Email
Jul 12, 2009
10:58 pm

NS Basic/Desktop's runtime is pretty solid. I'm sure there is a good explanation for the weird things you are seeing. Once they are isolated, we will help...
George Henne
ghenne
Offline Send Email
Jul 13, 2009
12:52 pm
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