@Ghazalshokrollahi - you may have to reach out to the MYOB support team as they may have some different functionality than standard Acumatica.
thanks @Debbie Baldwin I have logged a support case with them and they are unable to confirm. I don’t have access to the older versions of MYOB but I am pretty sure this function was available in previous versions where we could leave the supplier blank and multiple POs would be created if material lines had different suppliers. this function seems to be broken in the new versions . I would like to confirm if this is the functionality in Acumatica now where you can leave supplier feild blank and expect multiple POs or not?
Thanks for looking in to this.
Ghazal
@Ghazalshokrollahi - in STD Acumatica - you must fill in the Vendor in order to create the PO.