Updating Delivery Block/Invoice Block in Sales Orders using web-service

Hello everyone,

I am using web service ManageSalesOrderIn to massively update Delivery Block reason and Invoice Block reason, based on the Customer Master Data.

Its working great when I have any Invoice/Delivery Block Reason. The problem is when I need to remove the Delivery/Invoice Block from the Sales Order.

I was trying to put just space as a value, but didnt work. Does anyone have any experience with this ?

Many Thanks,

Peter