diff --git a/fints4k/src/main/kotlin/net/dankito/fints/FinTsClient.kt b/fints4k/src/main/kotlin/net/dankito/fints/FinTsClient.kt
index 637e6ac1..0c81cd24 100644
--- a/fints4k/src/main/kotlin/net/dankito/fints/FinTsClient.kt
+++ b/fints4k/src/main/kotlin/net/dankito/fints/FinTsClient.kt
@@ -13,6 +13,7 @@ import net.dankito.fints.messages.datenelemente.implementierte.tan.TanMediumKlas
 import net.dankito.fints.messages.datenelemente.implementierte.tan.ZkaTanProcedure
 import net.dankito.fints.messages.segmente.id.CustomerSegmentId
 import net.dankito.fints.model.*
+import net.dankito.fints.response.GetUserTanProceduresResponse
 import net.dankito.fints.response.InstituteSegmentId
 import net.dankito.fints.response.Response
 import net.dankito.fints.response.ResponseParser
@@ -467,7 +468,7 @@ open class FinTsClient @JvmOverloads constructor(
 
         val requestBody = messageBuilder.createInitDialogMessage(bank, customer, product, dialogData, useStrongAuthentication)
 
-        val response = getAndHandleResponseForMessage(requestBody, bank)
+        val response = GetUserTanProceduresResponse(getAndHandleResponseForMessage(requestBody, bank))
 
         if (response.successful) {
             updateBankData(bank, response)
diff --git a/fints4k/src/main/kotlin/net/dankito/fints/response/GetUserTanProceduresResponse.kt b/fints4k/src/main/kotlin/net/dankito/fints/response/GetUserTanProceduresResponse.kt
new file mode 100644
index 00000000..765e4b56
--- /dev/null
+++ b/fints4k/src/main/kotlin/net/dankito/fints/response/GetUserTanProceduresResponse.kt
@@ -0,0 +1,24 @@
+package net.dankito.fints.response
+
+
+open class GetUserTanProceduresResponse(bankResponse: Response)
+    : Response(bankResponse.didReceiveResponse, bankResponse.receivedResponse, bankResponse.receivedSegments,
+    bankResponse.exception, bankResponse.noTanProcedureSelected, bankResponse.messageCreationError) {
+
+    /**
+     * comdirect sends "9955::Unzulässiges TAN-Verfahren." even though '999' is a valid TAN procedure
+     * for init dialog if user's TAN procedures are not known yet
+     * -> check if the only error is '9955', then it's still a success.
+     */
+    override val successful: Boolean
+        get() = noTanProcedureSelected == false && couldCreateMessage && didReceiveResponse
+                && tanRequiredButUserDidNotEnterOne == false
+                && (responseContainsErrors == false || containsOnlyInvalidTanProcedureError())
+
+    protected open fun containsOnlyInvalidTanProcedureError(): Boolean {
+        val errorFeedbacks = segmentFeedbacks.flatMap { it.feedbacks }.filter { it.isError }
+
+        return errorFeedbacks.size == 1 && errorFeedbacks.first().responseCode == 9955
+    }
+
+}
\ No newline at end of file