Applies to:Siebel CRM - Version: 184.108.40.206 SIA  - Release: V8
Information in this document applies to any platform.
The customer was using a UI data map to transform an instance of an IO into an instance of another IO. The IOs included an attachment IC. When the EAI Data Transformation Engine was called it failed with the following error:
"SBL-EAI-04058: Source expression generated attachment ID 'dGVzdA==' but the corresponding attachment cannot be found."
The source IO was an external IO. Data Type was set to DTYPE_TEXT for the IC field that was mapped to the Attachment Id field in the attachment IC in the internal target IO.
The error did not occur after the Data Type property of source IC field was changed to DTYPE_ATTACHMENT.