diff --git a/src/NetscriptFunctions.ts b/src/NetscriptFunctions.ts
index 7ec2da28b..896618d2a 100644
--- a/src/NetscriptFunctions.ts
+++ b/src/NetscriptFunctions.ts
@@ -261,13 +261,7 @@ export const ns: InternalAPI<NSFull> = {
 
     const server = helpers.getServer(ctx, hostname);
     if (!(server instanceof Server)) {
-      helpers.log(ctx, () => "Cannot be executed on this server.");
-      return Promise.resolve(0);
-    }
-
-    const host = GetServer(ctx.workerScript.hostname);
-    if (host === null) {
-      throw new Error("Workerscript host is null");
+      throw helpers.errorMessage(ctx, "Cannot be executed on this server.");
     }
 
     // No root access or skill level too low
@@ -286,6 +280,10 @@ export const ns: InternalAPI<NSFull> = {
         )} (t=${formatThreads(threads)}).`,
     );
     return helpers.netscriptDelay(ctx, growTime * 1000).then(function () {
+      const host = GetServer(ctx.workerScript.hostname);
+      if (host === null) {
+        throw helpers.errorMessage(ctx, `Cannot find host of WorkerScript. Hostname: ${ctx.workerScript.hostname}.`);
+      }
       const moneyBefore = server.moneyAvailable <= 0 ? 1 : server.moneyAvailable;
       processSingleServerGrowth(server, threads, host.cpuCores);
       const moneyAfter = server.moneyAvailable;
@@ -360,8 +358,7 @@ export const ns: InternalAPI<NSFull> = {
 
     const server = helpers.getServer(ctx, hostname);
     if (!(server instanceof Server)) {
-      helpers.log(ctx, () => "Cannot be executed on this server.");
-      return Promise.resolve(0);
+      throw helpers.errorMessage(ctx, "Cannot be executed on this server.");
     }
 
     // No root access or skill level too low
@@ -382,8 +379,7 @@ export const ns: InternalAPI<NSFull> = {
     return helpers.netscriptDelay(ctx, weakenTime * 1000).then(function () {
       const host = GetServer(ctx.workerScript.hostname);
       if (host === null) {
-        helpers.log(ctx, () => "Server is null, did it die?");
-        return Promise.resolve(0);
+        throw helpers.errorMessage(ctx, `Cannot find host of WorkerScript. Hostname: ${ctx.workerScript.hostname}.`);
       }
       const weakenAmt = getWeakenEffect(threads, host.cpuCores);
       server.weaken(weakenAmt);
diff --git a/src/NetscriptFunctions/Singularity.ts b/src/NetscriptFunctions/Singularity.ts
index 7bc02e73e..77db2199d 100644
--- a/src/NetscriptFunctions/Singularity.ts
+++ b/src/NetscriptFunctions/Singularity.ts
@@ -559,8 +559,7 @@ export function NetscriptSingularity(): InternalAPI<ISingularity> {
       helpers.checkSingularityAccess(ctx);
       const baseserver = Player.getCurrentServer();
       if (!(baseserver instanceof Server)) {
-        helpers.log(ctx, () => "Cannot backdoor this kind of server");
-        return Promise.resolve();
+        throw helpers.errorMessage(ctx, "Cannot backdoor this kind of server.");
       }
       const server = baseserver;
       const installTime = (calculateHackingTime(server, Player) / 4) * 1000;
diff --git a/src/Terminal/commands/backdoor.ts b/src/Terminal/commands/backdoor.ts
index f266ef80a..b50c89f1a 100644
--- a/src/Terminal/commands/backdoor.ts
+++ b/src/Terminal/commands/backdoor.ts
@@ -2,7 +2,6 @@ import { Terminal } from "../../Terminal";
 import { Player } from "@player";
 import { BaseServer } from "../../Server/BaseServer";
 import { Server } from "../../Server/Server";
-import { HacknetServer } from "../../Hacknet/HacknetServer";
 
 export function backdoor(args: (string | number | boolean)[], server: BaseServer): void {
   if (args.length !== 0) {
@@ -11,24 +10,24 @@ export function backdoor(args: (string | number | boolean)[], server: BaseServer
   }
 
   if (!(server instanceof Server)) {
-    Terminal.error("Can only backdoor normal servers");
+    Terminal.error("Can only install a backdoor on normal servers");
+    return;
   }
-
-  const normalServer = server as Server;
-
-  if (normalServer.purchasedByPlayer) {
+  if (server.purchasedByPlayer) {
     Terminal.error(
-      "Cannot use backdoor on your own machines! You are currently connected to your home PC or one of your purchased servers",
+      "Cannot install a backdoor on your own machines! You are currently connected to your home PC or one of your purchased servers.",
     );
-  } else if (!normalServer.hasAdminRights) {
-    Terminal.error("You do not have admin rights for this machine! Cannot backdoor");
-  } else if (normalServer.requiredHackingSkill > Player.skills.hacking) {
-    Terminal.error(
-      "Your hacking skill is not high enough to use backdoor on this machine. Try analyzing the machine to determine the required hacking skill",
-    );
-  } else if (normalServer instanceof HacknetServer) {
-    Terminal.error("Cannot use backdoor on this type of Server");
-  } else {
-    Terminal.startBackdoor();
+    return;
   }
+  if (!server.hasAdminRights) {
+    Terminal.error("You do not have admin rights for this machine");
+    return;
+  }
+  if (server.requiredHackingSkill > Player.skills.hacking) {
+    Terminal.error(
+      "Your hacking skill is not high enough to install a backdoor on this machine. Try analyzing the machine to determine the required hacking skill.",
+    );
+    return;
+  }
+  Terminal.startBackdoor();
 }