Please fix this error.
DEAR will send an email with an INV number in the body of a message but without the attachment if the Invoice has not been first Saved. This behaviour catches us out if we don't remember to check that there is an attachment to the message.
Please ask your developers to do one of two things:
1. Automatically generate the INV number and attach the Invoice to the email when sending or;
2. Provide a pop-up warning that there is no attachment when attempting to send an email.