diff --git a/src/utilities/sequence-editor/from-seq-json.ts b/src/utilities/sequence-editor/from-seq-json.ts
index 160764e128..cd59465330 100644
--- a/src/utilities/sequence-editor/from-seq-json.ts
+++ b/src/utilities/sequence-editor/from-seq-json.ts
@@ -208,20 +208,20 @@ export async function seqJsonToSequence(input: string | null): Promise<string> {
     if (seqJson.immediate_commands) {
       sequence.push(`\n`);
       sequence.push(`@IMMEDIATE\n`);
-      for (const rtc of seqJson.immediate_commands) {
-        switch (rtc.type) {
+      for (const realTimeCommand of seqJson.immediate_commands) {
+        switch (realTimeCommand.type) {
           case 'command': {
             // FSW Commands
-            sequence.push(commandToString(rtc));
+            sequence.push(commandToString(realTimeCommand));
             break;
           }
           case 'activate':
           case 'load': {
-            sequence.push(loadOrActivateToString(rtc));
+            sequence.push(loadOrActivateToString(realTimeCommand));
             break;
           }
           default: {
-            throw new Error(`Invalid immediate command type ${rtc.type}`);
+            throw new Error(`Invalid immediate command type ${realTimeCommand.type}`);
           }
         }
       }
@@ -257,13 +257,23 @@ export async function seqJsonToSequence(input: string | null): Promise<string> {
   return sequence.join('');
 }
 
+function isCommand(step: Command | ImmediateFswCommand): step is Command {
+  return (step as Command).time !== undefined;
+}
+
 function commandToString(step: Command | ImmediateFswCommand): string {
-  const time = 'time' in step ? `${seqJsonTimeToSequence(step.time)} ` : '';
   const args = seqJsonArgsToSequence(step.args);
   const metadata = step.metadata ? seqJsonMetadataToSequence(step.metadata) : '';
-  const models = 'models' in step ? (step.models ? seqJsonModelsToSequence(step.models) : '') : '';
   const description = step.description ? seqJsonDescriptionToSequence(step.description) : '';
 
+  // used for commands, ImmediateFswCommand doesn't support 'time' and 'models'
+  let time = '';
+  let models = '';
+  if (isCommand(step)) {
+    time = step.time ? `${seqJsonTimeToSequence(step.time)} ` : '';
+    models = step.models ? (step.models ? seqJsonModelsToSequence(step.models) : '') : '';
+  }
+
   let commandString = `${time}${step.stem}${args}${description}`;
   // add a new line if on doesn't exit at the end of the commandString
   if (!commandString.endsWith('\n')) {
@@ -275,7 +285,7 @@ function commandToString(step: Command | ImmediateFswCommand): string {
 }
 
 function loadOrActivateToString(step: Activate | Load | ImmediateActivate | ImmediateLoad) {
-  const time = 'time' in step ? `${seqJsonTimeToSequence(step.time)} ` : '';
+  const time = (step as Activate | Load).time ? `${seqJsonTimeToSequence((step as Activate | Load).time)} ` : '';
   const args = step.args ? seqJsonArgsToSequence(step.args) : '';
   const metadata = step.metadata ? seqJsonMetadataToSequence(step.metadata) : '';
   const models = step.models ? seqJsonModelsToSequence(step.models) : '';