I am working on downloading a file exists on remote controller over WebVisu.
Following the file transfer example , I prepared a FB implements IVisuStreamReader to use file transfer feature on Visu as the screenshot attached, and it works with some small files enough to read whole content in 1 scan.
But with larger file, downloaded file contains only the end part of the original file.
Hello,
I am working on downloading a file exists on remote controller over WebVisu.
Following the file transfer example , I prepared a FB implements IVisuStreamReader to use file transfer feature on Visu as the screenshot attached, and it works with some small files enough to read whole content in 1 scan.
But with larger file, downloaded file contains only the end part of the original file.
Does anyone know how to fix this?
Best regards,
Self resolved.
Changing
readLen := SysFileRead(hFile:=hFile, pbyBuffer:=pbyBuffer, ulSize:=udiMaxNrBytes, pResult:=ADR(error));to
readLen := SysFileRead(hFile:=hFile, pbyBuffer:=pbyBuffer, ulSize:=udiMaxNrBytes-10, pResult:=ADR(error));cleared the problem.
But still, I don't understand why that happens.