Hello - it appears that my post regarding errors when uploading to Amazon S3 has "disappeared" without any reply (on this forum or my email).

Here is the error, as previously posted:

***WARNING*** Plugin returned errorcode 6. Error message=ChilkatLog:
  S3_UploadFile(531ms):
    DllDate: May 26 2017
    ChilkatVersion: 9.5.0.68
    UnlockPrefix: WATCHDHttp
    Architecture: Little Endian; 32-bit
    Language: Visual C++ 6.0
    VerboseLogging: 1
    bucketName: s3diskgrouptesting
    objectName: blah.pdf
    contentType: application/pdf
    localFilePath: C:\TEMP\S3_testing\blah.pdf
    fileMd5: 9Xd/RK1pKFQr2C4uv365VQ==
    s3__uploadData(531ms):
      awsAuthHeaderV2:
        resource: /s3diskgrouptesting/blah.pdf
     watchDirectory will continue

After performing some additional research regarding Chilkat version 9.5.0.68

This is a very old version (released circa 2017) and does NOT default to AWS signature version 4.

AWS signature V2 is:
- Deprecated
- No longer supported in most regions
- Sometimes rejected silently with a 403 forbidden

Even if the credentials are correct Chilkat version 9.5.0.68 is likely generating SigV2, causing AWS to reject.

Any thoughts or plans to update the upload to S3 function to utilize SigV4 ?

Thanks!

I will contact you by email during the weekend.