Fix

Author: Sg312

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/action-bar/action-bar.tsx

@@ -123,8 +123,9 @@ export const ActionBar = memo(
       return sourceIncomingEdges.length === 0
     }
 
+    // Non-trigger blocks need a snapshot to exist (so upstream outputs are available)
     const dependenciesSatisfied =
-      isTriggerBlock || incomingEdges.every((edge) => isSourceSatisfied(edge.source))
+      isTriggerBlock || (snapshot && incomingEdges.every((edge) => isSourceSatisfied(edge.source)))
     const canRunFromBlock =
       dependenciesSatisfied && !isNoteBlock && !isInsideSubflow && !isExecuting
 

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-workflow-execution.ts

@@ -1456,11 +1456,8 @@ export function useWorkflowExecution() {
         return sourceIncomingEdges.length === 0
       }
 
-      if (
-        !snapshot &&
-        !isTriggerBlock &&
-        !incomingEdges.every((edge) => isSourceSatisfied(edge.source))
-      ) {
+      // Non-trigger blocks need a snapshot to exist (so upstream outputs are available)
+      if (!snapshot && !isTriggerBlock) {
         logger.error('No execution snapshot available for run-from-block', { workflowId, blockId })
         return
       }

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/workflow.tsx

@@ -1137,8 +1137,9 @@ const WorkflowContent = React.memo(() => {
       return sourceIncomingEdges.length === 0
     }
 
+    // Non-trigger blocks need a snapshot to exist (so upstream outputs are available)
     const dependenciesSatisfied =
-      isTriggerBlock || incomingEdges.every((edge) => isSourceSatisfied(edge.source))
+      isTriggerBlock || (snapshot && incomingEdges.every((edge) => isSourceSatisfied(edge.source)))
     const isNoteBlock = block.type === 'note'
     const isInsideSubflow =
       block.parentId && (block.parentType === 'loop' || block.parentType === 'parallel')