Read Warning message and throw an additional error message

Hi Experts,

I have a requirement.

When ever there is a warning message VL 150 is triggered during delivery creation.

An Error message as to be triggered, which will block the partial delivery being created.

Program : MV50AFZ1

User Exit :   FORM USEREXIT_SAVE_DOCUMENT_PREPARE.

Why i am not configuring this in the Message level is because i need this error to be triggered only to some order types.

Is it possible to read a warning message from the Error log from the user exit ?

I need the code to read the warning message and and throw an Error message stating that "The Part delivery is not allowed in "XXXX" Order types"

I am not from ABAP background. If this is possible then i will give the requirement to our technical team. 

Appreciate all your support.