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Comment: updated info re CVAR support

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Where and How to use CVARs

CVARs are currently supported

  • in the test and value expressions in the NMIS alert and threshold subsystem,
  • and in calculate expressions in the general modelling subsystem,
  • and from NMIS version 8.6 on, also in control expressions evereywhere (in versions before that only a single CVAR  was supported in control).

To use CVARs you define the required CVARs as holding a previously specified SNMP variable at the beginning of one of the supported expressions; Subsequently you can then reference the CVAR value in the part of the expression that calculates the desired value to be used by NMIS.

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