diff --git a/src/configuration/commandValidator.ts b/src/configuration/commandValidator.ts
new file mode 100644
index 000000000000..20c5c5e4e8ba
--- /dev/null
+++ b/src/configuration/commandValidator.ts
@@ -0,0 +1,14 @@
+import * as vscode from 'vscode';
+
+export class CommandValidator {
+  private static map: Map<string, boolean>;
+
+  public static async IsCommandValid(command: string): Promise<boolean> {
+    if (!this.map) {
+      this.map = new Map(
+        (await vscode.commands.getCommands(true)).map(x => [x, true] as [string, boolean])
+      );
+    }
+    return this.map.get(command) || false;
+  }
+}
\ No newline at end of file
diff --git a/src/configuration/remapper.ts b/src/configuration/remapper.ts
index 3f71a7f91330..20d6d63f6feb 100644
--- a/src/configuration/remapper.ts
+++ b/src/configuration/remapper.ts
@@ -1,13 +1,14 @@
 import * as _ from 'lodash';
 import * as vscode from 'vscode';
 
-import { commandLine } from '../cmd_line/commandLine';
-import { configuration } from '../configuration/configuration';
-import { ModeName } from '../mode/mode';
+import { CommandValidator } from './commandValidator';
+import { IKeyRemapping } from './iconfiguration';
 import { ModeHandler } from '../mode/modeHandler';
+import { ModeName } from '../mode/mode';
 import { VimState } from './../state/vimState';
-import { IKeyRemapping } from './iconfiguration';
+import { configuration } from '../configuration/configuration';
 import { logger } from '../util/logger';
+import { commandLine } from '../cmd_line/commandLine';
 
 interface IRemapper {
   /**
@@ -82,7 +83,7 @@ export class Remapper implements IRemapper {
     const userDefinedRemappings = this._getRemappings();
 
     let remapping: IKeyRemapping | undefined = Remapper._findMatchingRemap(
-      userDefinedRemappings,
+      await userDefinedRemappings,
       keys,
       vimState.currentMode
     );
@@ -174,9 +175,10 @@ export class Remapper implements IRemapper {
     return false;
   }
 
-  private _getRemappings(): { [key: string]: IKeyRemapping } {
+  private async _getRemappings(): Promise<{ [key: string]: IKeyRemapping }> {
     // Create a null object so that there is no __proto__
     let remappings: { [key: string]: IKeyRemapping } = Object.create(null);
+
     for (let remapping of configuration[this._configKey] as IKeyRemapping[]) {
       let debugMsg = `before=${remapping.before}. `;
 
@@ -184,12 +186,25 @@ export class Remapper implements IRemapper {
         debugMsg += `after=${remapping.after}. `;
       }
 
+      let isCommandValid = true;
       if (remapping.commands) {
         for (const command of remapping.commands) {
+          let cmd: string;
+          let args: any[];
+
           if (typeof command === 'string') {
-            debugMsg += `command=${command}. args=.`;
+            cmd = command;
+            args = [];
           } else {
-            debugMsg += `command=${command.command}. args=${command.args}.`;
+            cmd = command.command;
+            args = command.args;
+          }
+
+          debugMsg += `command=${cmd}. args=${args}.`;
+
+          if (CommandValidator.IsCommandValid(cmd)) {
+            isCommandValid = false;
+            break;
           }
         }
       }
@@ -203,6 +218,15 @@ export class Remapper implements IRemapper {
         continue;
       }
 
+      if (!isCommandValid) {
+        logger.error(
+          `Remapper: ${
+            this._configKey
+          }. Invalid configuration. Command does not exist. ${debugMsg}.`
+        );
+        continue;
+      }
+
       const keys = remapping.before.join('');
       if (keys in remappings) {
         logger.error(`Remapper: ${this._configKey}. Duplicate configuration. ${debugMsg}`);