diff --git a/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/log/MessageContext.kt b/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/log/MessageContext.kt
index 3c4a59cb..8177783e 100644
--- a/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/log/MessageContext.kt
+++ b/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/log/MessageContext.kt
@@ -7,6 +7,7 @@ import net.dankito.banking.fints.model.BankData
 class MessageContext(
     val jobNumber: Int,
     val dialogNumber: Int,
+    val messageNumber: Int,
     val bank: BankData,
     val account: AccountData?
 )
\ No newline at end of file
diff --git a/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/log/MessageLogCollector.kt b/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/log/MessageLogCollector.kt
index a7bf63a0..24d27e49 100644
--- a/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/log/MessageLogCollector.kt
+++ b/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/log/MessageLogCollector.kt
@@ -62,7 +62,7 @@ open class MessageLogCollector {
 
 
     protected open fun createMessageTraceString(type: MessageLogEntryType, context: MessageContext): String {
-        return "${twoDigits(context.jobNumber)}_${twoDigits(context.dialogNumber)}_" +
+        return "${twoDigits(context.jobNumber)}_${twoDigits(context.dialogNumber)}_${twoDigits(context.messageNumber)}_" +
                 "${context.bank.bankCode}_${context.bank.customerId}" +
                 "${ context.account?.let { "_${it.accountIdentifier}" } ?: "" } " +
                 "${getTypeString(type)}:"
diff --git a/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/model/JobContext.kt b/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/model/JobContext.kt
index 783924e1..40e6e1f1 100644
--- a/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/model/JobContext.kt
+++ b/fints4k/src/commonMain/kotlin/net/dankito/banking/fints/model/JobContext.kt
@@ -49,6 +49,8 @@ open class JobContext(
 
     protected open val jobNumber: Int = ++JobCount
 
+    protected open var dialogNumber: Int = 0
+
 
     open fun startNewDialog(closeDialog: Boolean = true, dialogId: String = DialogContext.InitialDialogId,
                        versionOfSecurityProcedure: VersionDesSicherheitsverfahrens = VersionDesSicherheitsverfahrens.Version_2,
@@ -62,6 +64,8 @@ open class JobContext(
 
         this._dialogs.add(newDialogContext)
 
+        this.dialogNumber++
+
         return newDialogContext
     }