Safety Stock Planning not completing - /n/SAPAPO/MSDP_SB T-Code

While running Safety Stock Planning (/n/SAPAPO/MSDP_SB transaction) in SCM for products at a particular location, the system hangs and never completes the process.  The message at the bottom is u201CDetermining Demand Information: <location> <product>u201D.  This process works fine when running on any product at another location. 
In order to avoid the above infinite/endless loops, in the Safety Stock Planning Profile, the checkbox for Execute Cycle Test was selected.   While this did resolve the endless loop that the program was running, it now results in an error.. Now, it gives an error message "Cycle found for product <product> at location <location>".
Any ideas on how to resolve this issue?

Hi,
Thanks for the reply....it was really helpful.
We verified T-Lanes by using t-code WUF. There was transportation lane between location 6000 and location 6010 and vice -versa with all products selected. So, we put a block on all products on one T-Lane.
Thanks.
Naveen

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