We report on the application of SPIN for model-checking C source code which is generated out of a textual domain-specific language (DSL). We have built a tool which automatically generates the necessary SPIN wrapper code using (meta-)information available at the DSL level. The approach is part of a larger tool-chain for developing mission critical applications. The main purpose of SPIN is for bug-finding where error traces resulting from SPIN can be automatically replayed at the DSL level and yield concise explanations in terms of a temporal specification DSL. The tool-chain is applied in some large scale industrial applications.