GTPv2 cause 74 Semantic error in the TFT operation
GTPv2-C cause3GPP TS 29.274 §8.4 (Table 8.4-1)
What it means
The Traffic Flow Template in the request had a semantic error (Semantic error in the TFT operation).
Where you see it
In the Cause IE of a GTPv2-C response (Create Session, Modify Bearer, Delete Session…) on S11, S5 or S8.
What to check
Check the exact TFT/packet filter contents in the request.
Check which node sent the response (MME, SGW or PGW): the cause belongs to that node's decision.
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