CubeProgrammer API Error: file does not exist, please check the file's path

[hamzamaq]

Hello,

I am using the CubeProgrammerAPI.dll in a C# software and I get this error :
CubeprogrammerErrorNoFile = -4, when I use the download function.

I don't understand why this file path issue persists. Even after changing the directory, the problem persists without success.

Here is my function:

string filePath = @"D:\DFU\CodeChanges_18_GasTypeTempComp.hex";

var filePathAdapted = string.IsNullOrEmpty(filePath) ? "" : filePath.Replace(@"\", "/");

uint address = 0x08000000;
uint isverify = 1;
uint isSkipErase = 0;
var password = "";

var download = CubeProgrammerApi.downloadFile(filePathAdapted, address, isSkipErase, isverify, password);

if (download != 0)
{
Console.WriteLine($"Download Error {download}", "No USB DFU available\n");
CubeProgrammerApi.disconnect();
return;
}

[TDK]

Does the file exist?

Perhaps try with the standard "\" directory separators that Windows expects. Supposed to work with either but not all software can handle it.

[Andrew Neil]

Please use this button to properly post source code:

[hamzamaq · Accepted solution]

It has been resolved, I was not including "charSet.Unicode" in the DllImport for proper marshaling of string between C# and C.

[DllImport(CubeProgrammerDll64, SetLastError = true, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Unicode)]
public static extern int downloadFile(string filePath, uint address, uint skipErase, uint verify, string binPath);

Anyways, Thank you!