Is there a simple way to detect that given method using: myMethod <primitive: #primFoo module: #moduleBar error: errorCode> but not: myMethod <primitive: #primFoo module: #moduleBar> ? should i use a method's pragmas to see if it has #primitive:module:error: pragma? And if this check is ok, do i remember correctly, that temp which is used for storing an error is first temp in context, i.e.: err := context tempAt: 1 ? (ok i checked, it is actually always last temp), no matter if i declare temps before pragma or not. i.e. the order is same for: myMethod | a b c | <primitive: #primFoo module: #moduleBar error: errorCode> and myMethod <primitive: #primFoo module: #moduleBar error: errorCode> | a b c | -- Best regards, Igor Stasenko.