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+---
+slug: "Next"
+title: "Next"
+authors: ecalc-team
+tags: [release, eCalc]
+sidebar_position: -42
+---
+
+# eCalc v9.12
+
+## Features
+* Mark negative fuel rates for fuel consumers with DIRECT type energy usage models as invalid. 
+  DIRECT type models with negative fuel rates (fuel consumers) are now marked as invalid. Negative load values (electrical consumers) are not marked as invalid since that might be valid in some cases.
+
+
+## Bug Fixes
+
+## Breaking changes
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