correct command line

[iiidefconiii]

That's not a contradiction.

Both statements are true:
1. 3 dashes are 1 too much
2. 1 dash is 1 dash missing

The only correct number of minus symbols (dashes) before the name of the (long) argument is 2.
Just have a look at the --help output.

It clearly says that the command line parameter is --veracrypt-pim followed by the number
e.g. --veracrypt-pim 2406

here the example shows a = sign. does this mather?

    --veracrypt-pim            | Num  | VeraCrypt personal iterations multiplier             | --veracrypt-pim=1000