diff --git a/Sources/ResgenSwift/Analytics/Analytics.swift b/Sources/ResgenSwift/Analytics/Analytics.swift
index 68999fd..2e51484 100644
--- a/Sources/ResgenSwift/Analytics/Analytics.swift
+++ b/Sources/ResgenSwift/Analytics/Analytics.swift
@@ -66,7 +66,13 @@ struct Analytics: ParsableCommand {
             print(error.description)
             Analytics.exit(withError: error)
         }
-        
+
+        guard TrackerType.hasValidTarget(in: options.target) else {
+            let error = AnalyticsError.noValidTracker(options.target)
+            print(error.description)
+            Analytics.exit(withError: error)
+        }
+
         // Check if needed to regenerate
         guard GeneratorChecker.shouldGenerate(force: options.forceGeneration,
                                               inputFilePath: options.inputFile,
@@ -78,12 +84,3 @@ struct Analytics: ParsableCommand {
         return true
     }
 }
-
-    // MARK: - Requirements
-
-    private func checkRequirements() -> Bool {
-        // Check les requirements et gestion des erreurs
-        // Il faut que toutes les erreurs générées par Analytics soit des AnalyticsError
-        true
-    }
-}
diff --git a/Sources/ResgenSwift/Analytics/AnalyticsError.swift b/Sources/ResgenSwift/Analytics/AnalyticsError.swift
index 9674522..b32198d 100644
--- a/Sources/ResgenSwift/Analytics/AnalyticsError.swift
+++ b/Sources/ResgenSwift/Analytics/AnalyticsError.swift
@@ -8,16 +8,20 @@
 import Foundation
 
 enum AnalyticsError: Error {
+    case noValidTracker(String)
     case fileNotExists(String)
     case missingElement(String)
     case invalidParameter(String)
-    
+    case parseFailed(String)
     case writeFile(String, String)
     
     var description: String {
         switch self {
+        case .noValidTracker(let inputTargets):
+            return "error: [\(Analytics.toolName)] '\(inputTargets)' ne contient aucun tracker valid"
+
         case .fileNotExists(let filename):
-            return "error: [\(Analytics.toolName)] File \(filename) does not exists "
+            return "error: [\(Analytics.toolName)] File \(filename) does not exists"
             
         case .missingElement(let element):
             return "error: [\(Analytics.toolName)] Missing \(element) for Matomo"
@@ -25,6 +29,9 @@ enum AnalyticsError: Error {
         case .invalidParameter(let reason):
             return "error: [\(Analytics.toolName)] Invalid parameter \(reason)"
             
+        case .parseFailed(let baseError):
+            return "error: [\(Analytics.toolName)] Parse input file failed: \(baseError)"
+
         case .writeFile(let subErrorDescription, let filename):
             return "error: [\(Analytics.toolName)] An error occured while writing content to \(filename): \(subErrorDescription)"
         }
diff --git a/Sources/ResgenSwift/Analytics/Model/TargetType.swift b/Sources/ResgenSwift/Analytics/Model/TargetType.swift
index c9b5649..412d5c3 100644
--- a/Sources/ResgenSwift/Analytics/Model/TargetType.swift
+++ b/Sources/ResgenSwift/Analytics/Model/TargetType.swift
@@ -19,4 +19,11 @@ enum TrackerType: CaseIterable {
             "firebase"
         }
     }
+
+    static func hasValidTarget(in targets: String) -> Bool {
+        for tracker in Self.allCases where targets.contains(tracker.value) {
+            return true
+        }
+        return false
+    }
 }
diff --git a/Sources/ResgenSwift/Analytics/Parser/AnalyticsFileParser.swift b/Sources/ResgenSwift/Analytics/Parser/AnalyticsFileParser.swift
index f4e18ce..1137f8e 100644
--- a/Sources/ResgenSwift/Analytics/Parser/AnalyticsFileParser.swift
+++ b/Sources/ResgenSwift/Analytics/Parser/AnalyticsFileParser.swift
@@ -22,7 +22,8 @@ class AnalyticsFileParser {
         do {
             let tagFile = try YAMLDecoder().decode(AnalyticsFile.self, from: data)
             return tagFile
-        } catch let error {
+        } catch {
+            let error = AnalyticsError.parseFailed(error.localizedDescription)
             print(error.description)
             Analytics.exit(withError: error)
         }
@@ -32,15 +33,15 @@ class AnalyticsFileParser {
         parameters.map { dtoParameter in
             // Type
             
-            let type = value.type.uppercasedFirst()
-            
+            let type = dtoParameter.type.uppercasedFirst()
+
             guard 
                 type == "String" ||
                 type == "Int" ||
                 type == "Double" ||
                 type == "Bool"
             else {
-                let error = AnalyticsError.invalidParameter("type of \(value.name)")
+                let error = AnalyticsError.invalidParameter("type of \(dtoParameter.name)")
                 print(error.description)
                 Analytics.exit(withError: error)
             }
@@ -93,7 +94,7 @@ class AnalyticsFileParser {
                 parameters: screen.parameters
             )
 
-            if target.contains(Analytics.TargetType.matomo.value) {
+            if target.contains(TrackerType.matomo.value) {
                 // Path
 
                 guard let path = screen.path else {
@@ -120,7 +121,7 @@ class AnalyticsFileParser {
                 parameters: event.parameters
             )
 
-            if target.contains(Analytics.TargetType.matomo.value) {
+            if target.contains(TrackerType.matomo.value) {
                 // Category
                 guard let category = event.category else {
                     let error = AnalyticsError.missingElement("event category")
diff --git a/Tests/ResgenSwiftTests/Analytics/AnalyticsGeneratorTests.swift b/Tests/ResgenSwiftTests/Analytics/AnalyticsGeneratorTests.swift
index 88f9883..7abe69f 100644
--- a/Tests/ResgenSwiftTests/Analytics/AnalyticsGeneratorTests.swift
+++ b/Tests/ResgenSwiftTests/Analytics/AnalyticsGeneratorTests.swift
@@ -51,7 +51,7 @@ final class AnalyticsGeneratorTests: XCTestCase {
         ]
         
         // When
-        AnalyticsGenerator.targets = [Analytics.TargetType.firebase]
+        AnalyticsGenerator.targets = [TrackerType.firebase]
         let extensionContent = AnalyticsGenerator.getExtensionContent(sections: [sectionOne, sectionTwo, sectionThree],
                                                                  tags: ["ios", "iosonly"],
                                                                  staticVar: false,
@@ -216,7 +216,7 @@ final class AnalyticsGeneratorTests: XCTestCase {
         ]
         
         // When
-        AnalyticsGenerator.targets = [Analytics.TargetType.matomo]
+        AnalyticsGenerator.targets = [TrackerType.matomo]
         let extensionContent = AnalyticsGenerator.getExtensionContent(sections: [sectionOne, sectionTwo, sectionThree],
                                                                  tags: ["ios", "iosonly"],
                                                                  staticVar: false,
@@ -409,7 +409,7 @@ final class AnalyticsGeneratorTests: XCTestCase {
         ]
         
         // When
-        AnalyticsGenerator.targets = [Analytics.TargetType.matomo, Analytics.TargetType.firebase]
+        AnalyticsGenerator.targets = [TrackerType.matomo, TrackerType.firebase]
         let extensionContent = AnalyticsGenerator.getExtensionContent(sections: [sectionOne, sectionTwo, sectionThree],
                                                                  tags: ["ios", "iosonly"],
                                                                  staticVar: false,