RExpression fails to convert arrayType(niltype)
Create a workflow with 2 RExpressions. The first should output c(NA, NA). The second should take the output from the first as input. Hook a Display to the output of the second to observe the error in R. Basically, a token of arrayType(niltype) is sent, but the second RExpression doesn't know how to convert this and drops the token. I think it just needs another entry of "|| (token_type_string.startsWith("arrayType(niltype"))" around line 631 of RExpression.java.