I was involved with one of those UML -> Code systems back in the early 2000's. It was company called Nuevis. I had proposed a simple CMS to be written in ASP

I was involved with one of those UML -> Code systems back in the early 2000's. It was company called Nuevis. I had proposed a simple CMS to be written in ASP (or maybe Cold Fusion). We had a project plan, requirements and design documents and developers ready to start. Some architect said we would be the perfect use case to test this new technology. We met with them, licensed their system and began to make UML. After several weeks we started to generate code, but it wouldn't run. Several more weeks and we had running code, but were missing key functional requirements. We pulled the plug after 6 months. It turns out that UML class and state diagrams are just not robust enough to explain specific functional details. The system generated thousands of lines of code to do simple things. We ended up writing it ourselves in ASP, it took us about 3 weeks to code everything. Nuevis went out of business in the original dot-com bust.