Multirate Dataflow provides configurable node execution behaviors that prevent you from calling Multirate diagrams in all circumstances.
LabVIEW places the following restrictions on calling a Multirate diagram:
You can call a Multirate diagram only from a VI targeted to a host or FPGA.
If you call a Multirate diagram from a VI targeted to an FPGA, the Multirate Diagram integration node must be outside of a Clock-Driven Loop.
You cannot call a Multirate diagram from an FPGA IP VI, from a Clock-Driven Logic document, or from the inside of a Clock-Driven Loop.