Rule help

[elidell]

I was looking into writing rules, and was interested in the Memory rule..

Lets say i have the word  "password" in my dictionary.

i was trying to write a simple rule that would add 123 to the end and then place the original word after that, resulting in "password123password"

i thought i got it, and would write the rule $1$2$3M4

but that gave me an error:

Code:

Cannot convert rule for use on OpenCL device in file myfirst_rules on line 1

so i backed up and went with the example shown here: https://hashcat.net/wiki/doku.php?id=rule_based_attack

and simply wrote the rule :

uMl4


same error : Cannot convert rule for use on OpenCL device in file myfirst_rules on line 1: uMl4