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I try to operate FeynArts, I installed by

<< FeynArts`

Then I typed

$ tops := CreateTopologies[1, 1 -> 2, ExcludeTopologies -> Internal];

$ InsertFields[tops, V[2] -> {F[4, {3}], -F[4, {3}]}, Model ->{SM}];

Here it gave an error

InsertFields::syntax: The syntax of InsertFields is InsertFields[tops, in -> out, options].

Any help to solve this,

S

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# Operate FeynArts

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