"No such file" error when using OpenFile with createTruncate

I'm trying to create or truncate a file on the server (original code in FoxPro), but I'm getting the following response. I had changed the disposition to "createTruncate,deleteOnClose" when this started, and I removed deleteOnClose back out, but I am still receiving this message:

SftpVersion: 3
sftpOpenFile:
remotePath: (IP address cleared for security)/FTPTEST.TXT
access: readWrite
createDisposition: createTruncate
v3Flags: 0x1b
Sent FXP_OPEN
StatusResponseFromServer:
Request: FXP_OPEN
InformationReceivedFromServer:
StatusCode: 2
StatusMessage: No such file

Actual code is as follows:

lcTargetFile = lcServerName + lcFoldername + "FTPTEST.TXT"
oSFTP.CONNECT(lcServerName,lnFTPPort)
oSFTP.AuthenticatePW(lcServerUID, lcServerPwd)
oSFTP.InitializeSFTP()
lnHandle = oSFTP.OpenFile(lcTargetFile,"readWrite","createTruncate")

My handle at this point is an empty string, and the LastErrorText returns the above. Any hints or help would be greatly appreciated!