Subscript out of bound while running the model in r using nimble package

Question

I am running the following code in R

nimbleNBModel <- nimbleModel(code = nbModel, name = 'nimbleNBModel', 
                             constants = Consts, data = nimbleData, inits = inits)

I am getting an error of

defining model...
Error in decl$symbolicParentNodesReplaced[[which(vars[idx] == decl$rhsVars)]] : subscript out of bounds

Can anybody suggest what is going wrong....