The 0x6330071 and 0x6330076 event codes generated by UIM's Spectrum Gateway Probe are displayed as generated by NIMSOFT SNMP GATEWAY.
CA Spectrum receives alarms from Spectrum Gateway Probe, an originating event 0x06330071, is used in Spectrum to raise events based on event conditions. But if you look at the 0x6330071 Event Message, it is saying NIMSOFT SNMP GATEWAY instead of UIM's Spectrum Gateway Probe (Spectrum gtw).
CA Spectrum 10.1.x, 10.2.x
The workaround is editing the $SPECROOT/SG-Support/CsEvFormat/Event06330071_en_US and Event06330076_en_US files in the OneClick machine.
Replace the NIMSOFT SNMP GATEWAY by UIM's Spectrum Gateway Probe (Spectrum gtw) in the event message text.
And then click on "Update Event and Alarm Files" in OneClick Administration page to reload the changes into the OneClick memory.
Changes will be available in Spectrum 10.3 version.
Appendix. Event Management using spectrumgtw probe