diff --git a/CHANGELOG.md b/CHANGELOG.md
index f7f7f567..a44d59ea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - #822: The CPF resource processor now supports system expressions and macros in CPF merge files
 - #578 Added functionality to record and display IPM history of install, uninstall, load, and update
 - #961: Adding creation of a lock file for a module by using the `-create-lockfile` flag on install.
+- #994: prevent crash when target namespace lacks IPM mappings
 
 ### Changed
 - #316: All parameters, except developer mode, included with a `load`, `install` or `update` command will be propagated to dependencies
diff --git a/src/cls/IPM/Main.cls b/src/cls/IPM/Main.cls
index 8734ec9a..49b2326a 100644
--- a/src/cls/IPM/Main.cls
+++ b/src/cls/IPM/Main.cls
@@ -1079,7 +1079,11 @@ ClassMethod Namespace(ByRef pCommandInfo) [ Internal ]
     set name = $translate($get(pCommandInfo("parameters","name"),"*"),$char(34))
     if (name'["*") {
         try {
-            set $namespace = name
+            if '..IsIPMEnabled(name) {
+                write $$$FormattedLine($$$Red,"IPM is not enabled in the "_name_" namespace.")
+            } else {
+                set $namespace = name
+            }
         } catch ex {
             $$$ThrowStatus($$$ERROR($$$GeneralError,"Failed to switch to namespace: " _ name))
         }
@@ -1102,9 +1106,17 @@ ClassMethod Namespace(ByRef pCommandInfo) [ Internal ]
         do ##class(%Library.Prompt).GetString(prompt, .value)
         quit:value=""
         try {
-            set $namespace = $select($data(list(value), ns): $listget(ns), 1: value)
+            set selectedNamespace = $select($data(list(value), ns): $listget(ns), 1: value)
+            if '..IsIPMEnabled(selectedNamespace) {
+                write $$$FormattedLine($$$Red," IPM is not enabled for the selected "_selectedNamespace_" namespace.")
+                hang 0.5
+                // Clear the current line and move the cursor up to remove the error message
+                write $$$ClearLineAndMoveUp
+                continue
+            }
+            set $namespace = selectedNamespace
         } catch e {
-            write $char(13),*27,"[K",*27,"[A"
+            write $$$ClearLineAndMoveUp
             continue
         }
         quit
@@ -3848,7 +3860,8 @@ ClassMethod DisplayModules(
             if pNumbered {
                 write $justify(i, numbersWidth - 2), ". "
             }
-            write $$$FormattedLinePadRight($$$Magenta, tNS _ "> ", nsWidth)
+            set ipmStatus=$select('..IsIPMEnabled(tNS):"(IPM not enabled)",1:"")
+            write $$$FormattedLinePadRight($$$Magenta, tNS _ "> "_ipmStatus, nsWidth)
             set tPrefix = $justify("", numbersWidth) _ tNS
             kill tModulesList
             merge tModulesList = pList(i, "modules")
@@ -3927,6 +3940,13 @@ ClassMethod DisplayModules(
     }
 }
 
+ClassMethod IsIPMEnabled(pNamespace As %String = {$namespace}) As %Boolean
+{
+    new $namespace
+    set $namespace = pNamespace
+    return $system.CLS.IsMthd("%IPM.Main", "Shell")
+}
+
 ClassMethod GetUpstreamPackageVersions(Output list)
 {
     set query = "SELECT %DLIST(Name) AS Repos FROM %IPM_Repo.Definition"
diff --git a/src/inc/IPM/Formatting.inc b/src/inc/IPM/Formatting.inc
index c5db27dd..304bab00 100644
--- a/src/inc/IPM/Formatting.inc
+++ b/src/inc/IPM/Formatting.inc
@@ -10,6 +10,7 @@ ROUTINE %IPM.Formatting [Type=INC]
 
 /// Creates the control sequence for the formatting based on the code
 #define ControlSequence(%code) $Char(27)_"["_%code_"m"
+#define ClearLineAndMoveUp $char(13),*27,"[K",*27,"[A"
 
 #; Codes to add to convert format types
 #define Reset 20