simpler check for model loading compatibility errors

server/routes.go

@@ -97,6 +97,13 @@ func load(ctx context.Context, workDir string, model *Model, reqOpts map[string]
 
 		llmRunner, err := llm.New(workDir, model.ModelPath, model.AdapterPaths, opts)
 		if err != nil {
+			// some older models are not compatible with newer versions of llama.cpp
+			// show a generalized compatibility error until there is a better way to
+			// check for model compatibility
+			if strings.Contains(err.Error(), "failed to load model") {
+				err = fmt.Errorf("%v: this model may be incompatible with your version of Ollama. If you previously pulled this model, try updating it by running `ollama pull %s`", err, model.ShortName)
+			}
+
 			return err
 		}