BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  NMFTP (access violation Error)          BorlandTalk.com Forum Index -> C++ Builder (VCL Components Usage) View previous topic :: View next topic   Author Message Sudesh Guest Posted: Thu Apr 29, 2004 10:21 am    Post subject: NMFTP (access violation Error) Hi Group: I was trying NMFTP example from the help file. I am able to connect but at the following line get an access violation error. StringGrid1->RowCount = NMFTP1->FTPDirectoryList->name->Count; Any idea? Thanks, Sudesh Back to top Hans Galema Guest Posted: Thu Apr 29, 2004 11:37 am    Post subject: Re: NMFTP (access violation Error) Sudesh wrote: Quote: I was trying NMFTP example from the help file. I am able to connect but at the following line get an access violation error. StringGrid1->RowCount = NMFTP1->FTPDirectoryList->name->Count; Well with that code the problem could be at two places. Please first discover the exact place with: int RowCount = NMFTP1->FTPDirectoryList->name->Count; if ( RowCount < 0 ) { Showmessage ( IntToStr ( RowCount ) ); // Yes I know that IntToStr is not needed. RowCount = 0; } StringGrid1->RowCount = RowCount; Where is the access violation now ? Hans. Back to top Sudesh Guest Posted: Thu Apr 29, 2004 12:23 pm    Post subject: Re: NMFTP (access violation Error) Yes Hans, i had tried it assigning to a variable first. but gives same error at that line. I have just 2 files in the folder. any idea? thanks Sudesh "Hans Galema" <dontusethis (AT) dontusethis (DOT) nl> wrote Quote: Sudesh wrote: I was trying NMFTP example from the help file. I am able to connect but at the following line get an access violation error. StringGrid1->RowCount = NMFTP1->FTPDirectoryList->name->Count; Well with that code the problem could be at two places. Please first discover the exact place with: int RowCount = NMFTP1->FTPDirectoryList->name->Count; if ( RowCount < 0 ) { Showmessage ( IntToStr ( RowCount ) ); // Yes I know that IntToStr is not needed. RowCount = 0; } StringGrid1->RowCount = RowCount; Where is the access violation now ? Hans. Back to top Hans Galema Guest Posted: Thu Apr 29, 2004 2:04 pm    Post subject: Re: NMFTP (access violation Error) Sudesh wrote: Quote: Yes Hans, i had tried it assigning to a variable first. but gives same error at that line. I have just 2 files in the folder. any idea? Are there NULL pointers ? Try: if ( NMFTP1 && NMFTP1->FTPDirectoryList && NMFTP1->FTPDirectoryList->name ) { int RowCount = NMFTP1->FTPDirectoryList->name->Count; } else ShowMessage ( "Wrong pointer(s)" ); Hans. Back to top Sudesh Guest Posted: Thu Apr 29, 2004 6:25 pm    Post subject: Re: NMFTP (access violation Error) yes NMFTP1->FTPDirectoryList pointer is null. so what is the reason? & remedy? The directory exists on the server. Thanks, Sudesh "Hans Galema" <dontusethis (AT) dontusethis (DOT) nl> wrote Quote: Sudesh wrote: Yes Hans, i had tried it assigning to a variable first. but gives same error at that line. I have just 2 files in the folder. any idea? Are there NULL pointers ? Try: if ( NMFTP1 && NMFTP1->FTPDirectoryList && NMFTP1->FTPDirectoryList->name ) { int RowCount = NMFTP1->FTPDirectoryList->name->Count; } else ShowMessage ( "Wrong pointer(s)" ); Hans. Back to top Remy Lebeau (TeamB) Guest Posted: Thu Apr 29, 2004 7:32 pm    Post subject: Re: NMFTP (access violation Error) "Sudesh" <sudeshc (AT) vfemail (DOT) net> wrote Quote: yes NMFTP1->FTPDirectoryList pointer is null. Did you call the List() method first? Gambit Back to top Hans Galema Guest Posted: Thu Apr 29, 2004 7:37 pm    Post subject: Re: NMFTP (access violation Error) Sudesh wrote: Quote: yes NMFTP1->FTPDirectoryList pointer is null. so what is the reason? & remedy? The directory exists on the server. Did you send a command first to read out the directory ? Hans. Back to top Hans Galema Guest Posted: Thu Apr 29, 2004 7:38 pm    Post subject: Re: NMFTP (access violation Error) Sudesh wrote: Quote: The directory exists on the server. Which directory ? How could the FTP-server know about that directory ? Hans. Back to top Sudesh Guest Posted: Fri Apr 30, 2004 3:59 am    Post subject: Re: NMFTP (access violation Error) Sorry, looking at the help example again, I found that I had forgot to set ParseList to true. Let me try now. I am trying to build a program like ws_ftp. how simple (or difficult) is it?? Thanks, Sudesh "Hans Galema" <dontusethis (AT) dontusethis (DOT) nl> wrote Quote: Sudesh wrote: The directory exists on the server. Which directory ? How could the FTP-server know about that directory ? Hans. Back to top Hans Galema Guest Posted: Fri Apr 30, 2004 7:54 am    Post subject: Re: NMFTP (access violation Error) Sudesh wrote: Quote: ...I am trying to build a program like ws_ftp. how simple (or difficult) is it?? Did you ask Ipswitch, Inc. already ? You could do it simple or difficult. <g> Hans. Back to top Sudesh Guest Posted: Fri Apr 30, 2004 11:15 am    Post subject: Re: NMFTP (access violation Error) Sorry but still I am not able to get NMFTP1->FTPDirectoryList->name->Count. Anybody successful in getting the example in the help file work? Thanks, Sudesh "Sudesh" <sudeshc (AT) vfemail (DOT) net> wrote Quote: yes NMFTP1->FTPDirectoryList pointer is null. so what is the reason? & remedy? The directory exists on the server. Thanks, Sudesh "Hans Galema" <dontusethis (AT) dontusethis (DOT) nl> wrote in message news:409109c6$1 (AT) newsgroups (DOT) borland.com... Sudesh wrote: Yes Hans, i had tried it assigning to a variable first. but gives same error at that line. I have just 2 files in the folder. any idea? Are there NULL pointers ? Try: if ( NMFTP1 && NMFTP1->FTPDirectoryList && NMFTP1->FTPDirectoryList->name ) { int RowCount = NMFTP1->FTPDirectoryList->name->Count; } else ShowMessage ( "Wrong pointer(s)" ); Hans. 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