Hi

I'm using Xceed Zip Compression Library v6.1 as a ActiveX component in CBuilder 4.

When I call the following code to backup to the 'H:' Drive (a removable USB Key) it fails giving the error 510 (xerCannotUpdateAndSpan). It fails on the second call to the zip function. There is plenty free space on the USB key (250 megs) and and the backup file size is only ~1 meg. The code works fine if I backup to a network drive 'K'. Below is the code that I am using.... any Ideas :)


void __fastcall TForm1::Button1Click(TObject *Sender)
{
int Error;
AnsiString ZipFileName = "H:\\TestBackup.zip";
//AnsiString ZipFileName = "K:\\TestBackup.zip";
DeleteFile(ZipFileName);
XceedZip1->ZipFilename = ZipFileName;

XceedZip1->FilesToProcess = "C:\\winnt\\MyConfigs.ini";
Error = XceedZip1->Zip();
if (Error != 0)
{
ShowMessage("Failed " + String(Error));
return;
}

XceedZip1->FilesToProcess = "C:\\temp\\data\\*.*";
//----------------------------------------------------------------------------------
Error = XceedZip1->Zip(); //------------- Fails here reporting error 510
//----------------------------------------------------------------------------------

if (Error != 0)
{
ShowMessage("Failed " + String(Error));
return;
}
ShowMessage("Backup created");
}


object XceedZip1: TXceedZip
Left = 168
Top = 0
Width = 32
Height = 32
ControlData = {
0003000008000200000000000300060000000800020000000000030000000000
0300180000000800020000000000080002000000000007000000000000000040
070000000080409246410300000000000300000000000300000000000B000000
0B00FFFF0B0000000B0000000B0000000B00000008000200000000000B00FFFF
0800020000000000080002000000000003000200000003000A0000000B000000
0B00000008000200000000000800020000000000080002000000000003000000
0000080002000000000008000200000000000B00000008000200000000000800
02000000000008000200000000000800020000000000}
end

From the property's documentation ("<a href="http://doc.xceedsoft.com/products/Xceedzip/SpanMultipleDisks_property.html">SpanMultipleDisks</a> property"):

"When SpanMultipleDisks is set to xdsAlways or xdsRemovableDrivesOnly and that a removable drive is being written to, you can only use the Zip method to create a new spanned zip file. Once the spanned zip file has been created and contains files, no more files can be added to, or replaced in it."

As a workaround, set the SpanMultipleDisks property to xcdDiskSpanning.xdsNever when you are zipping on a USB Drive.

---

Charles Bérubé-Rémillard
Technical Support
Xceed Software Inc.