diff --git a/cnd.debugger.common2/src/org/netbeans/modules/cnd/debugger/common2/debugger/io/DebuggerExternalTerminal.java b/cnd.debugger.common2/src/org/netbeans/modules/cnd/debugger/common2/debugger/io/DebuggerExternalTerminal.java
--- a/cnd.debugger.common2/src/org/netbeans/modules/cnd/debugger/common2/debugger/io/DebuggerExternalTerminal.java
+++ b/cnd.debugger.common2/src/org/netbeans/modules/cnd/debugger/common2/debugger/io/DebuggerExternalTerminal.java
@@ -91,7 +91,11 @@
         if (ExternalTerminalProvider.getSupportedTerminalIDs().contains(termBaseName)) {
             NativeProcessBuilder npb = NativeProcessBuilder.newLocalProcessBuilder();
             ExternalTerminal terminal = ExternalTerminalProvider.getTerminal(exEnv, termBaseName);
-            terminal = terminal.setTitle(Catalog.get("Title_Debugger_External_Terminal")); // NOI18N
+            if (terminal != null) {
+                // In the case then "terminal" is null,
+                // null will be passed to useExternalTerminal and internal terminal will be called.
+                terminal = terminal.setTitle(Catalog.get("Title_Debugger_External_Terminal")); // NOI18N
+            }
             npb.useExternalTerminal(terminal);
             npb.setExecutable(gdbHelperScript.getAbsolutePath());
             npb.redirectError();