Android Question FTP upload problem

[taylorw]

Hi all, i have a problem is when i using my phone upload image it's can upload, but when i use customer phone to upload it can't upload without error.
My code is here.

dim FTP as FTP

FTP.Initialize("FTP", "domain", 21, "user", "password")
FTP.PassiveMode = True

FTP.UploadFile(Image_Dir, Image_Name, False, "/Folder/" & Update_Item_Code & ".jpg")

Sub FTP_UploadProgress (ServerPath As String, TotalUploaded As Long, Total As Long)
    Dim s As String
    s = "Uploaded " & Round(TotalUploaded / 1000) & "KB"
    If Total > 0 Then s = s & " out of " & Round(Total / 1000) & "KB"
    Log(s)
End Sub

Sub FTP_UploadCompleted (ServerPath As String, Success As Boolean)
    Log(ServerPath & ", Success=" & Success)
    If Success = False Then
        ToastMessageShow("Image Upload Fail.",True)
    Else
        Image_Upload_Done = True
    End If
End Sub

 

[DonManfred]

I dont see a erromessage!?

 

[taylorw]

Yes DonManfred, so i confusion.Because i don't know why, i try to upload in my customer phone but it run into here <ToastMessageShow("Image Upload Fail.",True)>.

 

[taylorw]

I dont see a erromessage!?

DonManfred, need how to get erromessage? Because don't have return any erromessage. Is any security problem?

 

[Erel]

Check the output of Log(LastException) when Success is False.

 

[taylorw]

Hi Erel, i get the error message.Below is that two error message.
<550 Access is denied. >
<550 The process cannot access the file because it is being used by another process. >
I try on another phone, but only this phone get this error,

 

[Erel]

There are two errors. The first means that the user doesn't have permission to access the relevant remote folder. The second means that the FTP server failed to write the file because it was locked by another process.

 

[taylorw]

so is my ftp server problem?
that phone is Samsung s8 Android 7.0

 

[Erel]

See my previous answer. This is what I understand from the error messages.