https://forge.codesys.com/forge/talk/Engineering/thread/117dffb6d1/2023-03-02T04:47:00.134000ZRecent posts to How to implement IVisuStreamReader2023-03-02T04:47:00.134000Z2023-03-02T04:47:00.134000Zryusouphttps://forge.codesys.com/u/ryusoup/https://forge.codesys.come8d9ebcf58dc2343fa59f5bb4f2952645143696a

<div class="markdown_content"><p>Self resolved.<br/> Changing</p> <div class="codehilite"><pre><span></span><span class="err">readLen := SysFileRead(hFile:=hFile, pbyBuffer:=pbyBuffer, ulSize:=udiMaxNrBytes, pResult:=ADR(error));</span> </pre></div> <p>to</p> <div class="codehilite"><pre><span></span><span class="err">readLen := SysFileRead(hFile:=hFile, pbyBuffer:=pbyBuffer, ulSize:=udiMaxNrBytes-10, pResult:=ADR(error));</span> </pre></div> <p>cleared the problem.<br/> But still, I don't understand why that happens.</p></div>

2023-03-01T01:03:30.122000Z2023-03-01T01:03:30.122000Zryusouphttps://forge.codesys.com/u/ryusoup/https://forge.codesys.coma7b431e84b9cfb7a7fb5490e0feb3b6a170746c9

<div class="markdown_content"><p>Hello,</p> <p>I am working on downloading a file exists on remote controller over WebVisu.<br/> Following the <a class="" href="https://store.codesys.com/en/visu-file-transfer-example.html" rel="nofollow">file transfer example</a> , 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.<br/> But with larger file, downloaded file contains only the end part of the original file.</p> <p>Does anyone know how to fix this?</p> <p>Best regards,</p></div>