Iteration convergence is extremely slow in the loop displayed

What causes this issue?

The SAP System could find no loop that caused termination. In the
iteration relationships, however, is a loop in which values to be
iterated are allocated for a long time in circles. The iteration thus
converges very slowly.

System Response

The iteration may terminate after a certain number of iteration steps
due to the slowness of the convergence.

How to fix this error?

If iteration terminates you have the following options.
Rework the sender-receiver relationships.
Let the iteration run in the background with more iteration steps
allowed.

Error message extract from SAP system. Copyright SAP SE.