Strange error message when adding components to form

[BLL]

Hi, I am quite new to lazarus, havng used CBuilder for years. I am finding the IDE very complicated! I had started to write a new application and had added various buttons, labels etc with no problems. Then, without rhyme or reason, I can no longer do so! Now, when I try and add any component to the main form, I get the following error dialogue:
The Codetools found an error
No scanner found for "/home/pi/Lazarus/Apps/Buccaneer/main.lfm"
If this is an error, please open the main source first.
I have no idea what a scanner is! main.lfm is my main form.
If I create another project, all is fine, so I don't have a clue what has happened and the dialogue is as clear as mud!!
Can someone tell me what has happened and why and how to get rid of the error?

I am using fpc 3.1.1 and lazarus 1.5 on a raspberry Pi

Thanks

Brian

[Zath]

One of your components might be referencing the Buccaneer scanner.
You might have looked at a demo and somehow transposed part of that demo into your program. This is quite easy if you say yes to saving the form before starting a project.

[ChrisF]

Apparently this error has already happened in the past in some -rare- cases:

http://forum.lazarus.freepascal.org/index.php/topic,22034
http://forum.lazarus.freepascal.org/index.php/topic,21348

Looking at the source code, this message is present in codetoolmanager.pas:

Code: Pascal  [Select][+][-]

1. function TCodeToolManager.GetCodeToolForSource(Code: TCodeBuffer;
2.   GoToMainCode, ExceptionOnError: boolean): TCustomCodeTool;
3. // return a codetool for the source
4. ...
5.   Result:=FindCodeToolForSource(Code);
6.   if Result=nil then begin
7.     CreateScanner(Code);
8.     if Code.Scanner=nil then begin
9.       if ExceptionOnError then
10.         raise ECodeToolManagerError.CreateFmt(ctsNoScannerFound,[Code.Filename]);
11.       exit;
12.     end;
13.  
14. ...
15.  
16.   // codetoolsmanager
17.   ctsNoScannerFound = 'No scanner found for "%s".'
18.       +' If this is an include file, please open the main source first.';
19.  
20.  

Sorry, I don't have any answer concerning a fix  for this issue...

I you look at the above topic, one people has solved all his troubles with a re-installation, while another one has just closed the offending form.

Deleting the .lps file of your project might eventually help (save it before deleting it); I just don't know...

Someone else with a better knowledge concerning the IDE may have the answer.

[BLL]

Hi, Thanks for the replies but I still don't know what this scanner is for! I think that Zath has the probable cause - I was pasting some code from another app into this one. If a project is this easy to ruin, it doesn't say much for lazarus!! It's a shame that the IDE is so complex and apparently unreliable compared with the various versions of CBuilder I have and do use!