diff --git a/ethereum/permissioning/src/main/java/tech/pegasys/pantheon/ethereum/permissioning/TomlConfigFileParser.java b/ethereum/permissioning/src/main/java/tech/pegasys/pantheon/ethereum/permissioning/TomlConfigFileParser.java
index aee91f3dfb..5b4a48075f 100644
--- a/ethereum/permissioning/src/main/java/tech/pegasys/pantheon/ethereum/permissioning/TomlConfigFileParser.java
+++ b/ethereum/permissioning/src/main/java/tech/pegasys/pantheon/ethereum/permissioning/TomlConfigFileParser.java
@@ -42,8 +42,8 @@ public class TomlConfigFileParser {
 
     if (result.hasErrors()) {
       final String errors =
-          result.errors().stream().map(TomlParseError::toString).collect(Collectors.joining("%n"));
-      throw new Exception("Invalid TOML configuration : " + errors);
+          result.errors().stream().map(TomlParseError::toString).collect(Collectors.joining("\n"));
+      throw new Exception("Invalid TOML configuration: \n" + errors);
     }
 
     return checkConfigurationValidity(result, toml);
diff --git a/pantheon/src/main/java/tech/pegasys/pantheon/cli/DefaultCommandValues.java b/pantheon/src/main/java/tech/pegasys/pantheon/cli/DefaultCommandValues.java
index f9f9cb2881..cf9df00f65 100644
--- a/pantheon/src/main/java/tech/pegasys/pantheon/cli/DefaultCommandValues.java
+++ b/pantheon/src/main/java/tech/pegasys/pantheon/cli/DefaultCommandValues.java
@@ -88,12 +88,12 @@ interface DefaultCommandValues {
     }
 
     // Try to create it, then verify if the provided path is not already existing and is not a
-    // directory .Otherwise, if it doesn't exist or exists but is already a directory,
+    // directory. Otherwise, if it doesn't exist or exists but is already a directory,
     // Runner will use it to store data.
     try {
       Files.createDirectories(pantheonHome);
     } catch (final FileAlreadyExistsException e) {
-      // Only thrown if it exist but is not a directory
+      // Only thrown if it exists but is not a directory
       throw new CommandLine.ParameterException(
           new CommandLine(command),
           String.format(
diff --git a/pantheon/src/main/java/tech/pegasys/pantheon/cli/PantheonCommand.java b/pantheon/src/main/java/tech/pegasys/pantheon/cli/PantheonCommand.java
index 5847fe20c6..760d55473d 100644
--- a/pantheon/src/main/java/tech/pegasys/pantheon/cli/PantheonCommand.java
+++ b/pantheon/src/main/java/tech/pegasys/pantheon/cli/PantheonCommand.java
@@ -318,7 +318,7 @@ public class PantheonCommand implements DefaultCommandValues, Runnable {
   private Long configureRefreshDelay(final Long refreshDelay) {
     if (refreshDelay < DEFAULT_MIN_REFRESH_DELAY || refreshDelay > DEFAULT_MAX_REFRESH_DELAY) {
       throw new ParameterException(
-          new CommandLine(this),
+          this.commandLine,
           String.format(
               "Refresh delay must be a positive integer between %s and %s",
               String.valueOf(DEFAULT_MIN_REFRESH_DELAY),
@@ -547,7 +547,7 @@ public class PantheonCommand implements DefaultCommandValues, Runnable {
     //noinspection ConstantConditions
     if (isMiningEnabled && coinbase == null) {
       throw new ParameterException(
-          new CommandLine(this),
+          this.commandLine,
           "Unable to mine without a valid coinbase. Either disable mining (remove --miner-enabled)"
               + "or specify the beneficiary of mining (via --miner-coinbase <Address>)");
     }
@@ -574,7 +574,7 @@ public class PantheonCommand implements DefaultCommandValues, Runnable {
           metricsConfiguration(),
           permissioningConfiguration);
     } catch (Exception e) {
-      throw new ParameterException(new CommandLine(this), e.getMessage());
+      throw new ParameterException(this.commandLine, e.getMessage());
     }
   }
 
@@ -590,7 +590,7 @@ public class PantheonCommand implements DefaultCommandValues, Runnable {
       PermissioningConfigurationValidator.areAllBootnodesAreInWhitelist(
           ethNetworkConfig, permissioningConfiguration);
     } catch (final Exception e) {
-      throw new ParameterException(new CommandLine(this), e.getMessage());
+      throw new ParameterException(this.commandLine, e.getMessage());
     }
   }
 
@@ -609,9 +609,9 @@ public class PantheonCommand implements DefaultCommandValues, Runnable {
           .privacyParameters(privacyParameters())
           .build();
     } catch (final InvalidConfigurationException e) {
-      throw new ExecutionException(new CommandLine(this), e.getMessage());
+      throw new ExecutionException(this.commandLine, e.getMessage());
     } catch (final IOException e) {
-      throw new ExecutionException(new CommandLine(this), "Invalid path", e);
+      throw new ExecutionException(this.commandLine, "Invalid path", e);
     }
   }
 
@@ -694,7 +694,7 @@ public class PantheonCommand implements DefaultCommandValues, Runnable {
   MetricsConfiguration metricsConfiguration() {
     if (isMetricsEnabled && isMetricsPushEnabled) {
       throw new ParameterException(
-          new CommandLine(this),
+          this.commandLine,
           "--metrics-enabled option and --metrics-push-enabled option can't be used at the same "
               + "time.  Please refer to CLI reference for more details about this constraint.");
     }
@@ -858,7 +858,7 @@ public class PantheonCommand implements DefaultCommandValues, Runnable {
         // if user provided it and provided the genesis file option at the same time, it raises a
         // conflict error
         throw new ParameterException(
-            new CommandLine(this),
+            this.commandLine,
             "--network option and --genesis-file option can't be used at the same time.  Please "
                 + "refer to CLI reference for more details about this constraint.");
       }
@@ -882,9 +882,7 @@ public class PantheonCommand implements DefaultCommandValues, Runnable {
                   .orElse(EthNetworkConfig.getNetworkConfig(MAINNET).getNetworkId()));
         } catch (final DecodeException e) {
           throw new ParameterException(
-              new CommandLine(this),
-              String.format("Unable to parse genesis file %s.", genesisFile),
-              e);
+              this.commandLine, String.format("Unable to parse genesis file %s.", genesisFile), e);
         }
       }
 
@@ -913,9 +911,7 @@ public class PantheonCommand implements DefaultCommandValues, Runnable {
       return Resources.toString(genesisFile().toURI().toURL(), UTF_8);
     } catch (final IOException e) {
       throw new ParameterException(
-          new CommandLine(this),
-          String.format("Unable to load genesis file %s.", genesisFile()),
-          e);
+          this.commandLine, String.format("Unable to load genesis file %s.", genesisFile()), e);
     }
   }