diff --git a/CanUds.c b/CanUds.c
index 8e45b70..f19cd16 100644
--- a/CanUds.c
+++ b/CanUds.c
@@ -1014,9 +1014,9 @@ static uint16_t vUDS_routine_Erase_Memory(tCanUds *env, eUdsRoutineControlType u
         return 0xFF00 | UDS_error_incorrectMessageLengthOrInvalidFormat;
     }
 
-    if ((env->udsFirmwareStepsMain != UDS_Firmware_Step_Preconditions) ||
-        ((env->udsFirmwareStepsCalib != UDS_Firmware_Step_Preconditions))) {
-        return 0xFF00 | UDS_error_conditionsNotCorrect;
+    if (((env->udsFirmwareStepsMain != UDS_Firmware_Step_Preconditions) && (env->udsFirmwareStepsMain != UDS_Firmware_Step_EraseMemory)) &&
+    ((env->udsFirmwareStepsCalib != UDS_Firmware_Step_Preconditions) && (env->udsFirmwareStepsCalib != UDS_Firmware_Step_EraseMemory))) {
+        return 0xFF00 | UDS_error_requestSequenceError;
     }
 
     tEraseMemory *eraseMemory = (tEraseMemory *) env->data->data;
@@ -1098,11 +1098,12 @@ vUDS_routine_Check_Programming_Dependancies(tCanUds *env, eUdsRoutineControlType
         return 0xFF00 | UDS_error_sub_functionNotSupported;
     }
 
-    if ((env->udsFirmwareStepsMain != UDS_Firmware_Step_EraseMemory) ||
-        ((env->udsFirmwareStepsCalib != UDS_Firmware_Step_EraseMemory))) {
-        return 0xFF00 | UDS_error_conditionsNotCorrect;
+    if (((env->udsFirmwareStepsMain != UDS_Firmware_Step_EraseMemory) && (env->udsFirmwareStepsMain != UDS_Firmware_Step_Dependancies)) &&
+        ((env->udsFirmwareStepsCalib != UDS_Firmware_Step_EraseMemory) && (env->udsFirmwareStepsCalib != UDS_Firmware_Step_Dependancies))) {
+        return 0xFF00 | UDS_error_requestSequenceError;
     }
 
+
     setResponseErrorPending(env, UDS_RoutineControl, UDS_error_requestCorrectlyReceived_ResponsePending);
 
     bool result = P_bInternalFlashPage_CopyRange(ADR_HEX_Mapped_BlockBoot, ADR_HEX_BlockBoot, SIZE_HEX_BlockBoot,
@@ -1240,8 +1241,7 @@ static uint16_t Routine_Control_31(tCanUds *env) {
     switch (routineIdentifier) {
         case Check_Programming_Preconditions: {
 
-            if ((env->currentSession == UDS_session_defaultSession) ||
-                (env->currentSession == UDS_session_programmingSession)) {
+            if (env->currentSession == UDS_session_defaultSession) {
                 return setResponseError(env, UDS_RoutineControl, UDS_error_conditionsNotCorrect);
             }
 
@@ -1547,7 +1547,7 @@ static uint16_t RequestDownload_34(tCanUds *env) {
     requestDownload_Response->ServiceId = UDS_RequestDownload | 0b1000000;
     requestDownload_Response->lengthFormatIdentifier = 0x20; // 2 байта - длина поля maxNumberOfBlockLength
 
-    uint8_t countBlock = 8;//31;
+    uint8_t countBlock = 31;//31;
     requestDownload_Response->maxNumberOfBlockLength = countBlock * 128 + 2;