Spirent TestCenter - Getting runtime error when starting Enhanced L4-7 test with apps.

Doc ID    KNI15864
Version:    1.0
Status:    Published
Published date:    11/21/2019


When running the app mix test in Enhanced L4-7 and increase the device count to 14, application throws an error related to streamblock modifiers which is a Spirent TestCenter related error. Streamblock modifiers shouldn't be used as the L4-7 traffic is independent of Streamblocks which only pertain to stateless TestCenter traffic.

Error says:
"The number of hardware modifier configured was exceeded. Might use stream in modifier instead."


  • Enhanced L4-7
  • Runtime Error
  • Hardware modifier
  • C50-KIT-11AX-1-V2 


The issue has not been reproduced, suggested to the customer to try out a fresh configuration.

Root Cause

No fault found.

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