CL_BCS is not sending email without attachment

Hello,

I used CL_BCS class methods to send email with attachment but noticed that when there is no attachment, class is not sending emails. CL_BCS->SEND calls another class CL_SEND_REQUEST_BCS->RELEASE which raises exception if no document is found as attachment.

Is there any OSS note which fixes this issue? Or is there alternative method which can be used?

Thank you.