diff --git a/include/blc_command.h b/include/blc_command.h
index 84cc23d25272700ea999d73599b557faaaba5264..9a51760a69e40dfde7d36aa7b277f36779f868f8 100644
--- a/include/blc_command.h
+++ b/include/blc_command.h
@@ -35,7 +35,7 @@ Few functions helping for pseudo realtime applications.
 #define BLC_COMMAND_LOOP(period) for(blc_command_loop_init(period); blc_command_loop_start();blc_command_loop_end())
 
 typedef enum {BLC_QUIT=0, BLC_RUN, BLC_PAUSE, BLC_STEPS} type_blc_status;
-typedef void (*type_blc_command_cb)(char const *argument, void *user_data);
+typedef void (*type_blc_command_cb)(char *argument, void *user_data);
 
 /** Timer updated by blc_command_loop_start and  blc_command_loop_end (i.e. BLC_LOOP_FOR(<period>))
  It may be use by the application to get the absolute time in µs using blc_loop_timer.tv_sec*1000000+blc_loop_timer.tv_usec
@@ -79,7 +79,7 @@ void blc_command_forward_blc_channels();
 void blc_command_remove(const char *command_name);
 
 ///Interpret the command passed in string.
-void blc_command_interpret_string(char const *input_string, size_t size);
+void blc_command_interpret_string(char *input_string, size_t size);
 
 ///Wait a input from the user (this id blocking) and interprets it depending on the blc_command list.
 void blc_command_interpret();
diff --git a/src/blc_command.cpp b/src/blc_command.cpp
index b2d84f774ae8ada8f5519a8dd699f433fcaeb063..1375d7c04335db4d16237e8f0774c11174cb43c0 100644
--- a/src/blc_command.cpp
+++ b/src/blc_command.cpp
@@ -118,9 +118,8 @@ void blc_command_remove(const char *command_name){
 }
 
 
-
-void blc_command_interpret_string(char const *input_string, size_t size){
-    char const*parameter;
+void blc_command_interpret_string(char *input_string, size_t size){
+    char *parameter;
     char *parameter2;
     
     size_t parameter_size, parameter2_size;
@@ -129,9 +128,7 @@ void blc_command_interpret_string(char const *input_string, size_t size){
     
     if (forward_blc_channel){
         if (input_string[0] && strchr("./^:", input_string[0])){ //it starts with ., ^ , / , :, it may be a blc_channel.
-            if (memchr(&input_string[1], '/', size)==0) // There is no / after the first char it is a blc_channel. NOTE: It may be an error with /usr /bin the user has to use /usr/ /bin/ etc.
-            {
-                
+            if (memchr(&input_string[1], '/', size)==0){ // There is no / after the first char it is a blc_channel. NOTE: It may be an error with /usr /bin the user has to use /usr/ /bin/ etc.
                 SYSTEM_ERROR_CHECK(puts(input_string), -1, NULL);
                 SYSTEM_ERROR_CHECK(fflush(stdout), -1, NULL);
                 return;
@@ -267,6 +264,4 @@ void blc_command_update_double_cb(char const *argument, void *double_pt){
         else *(double*)double_pt=value;
     }
 }
-
-
 END_EXTERN_C
diff --git a/src/blc_loop.cpp b/src/blc_loop.cpp
index 649140e3105e2ca4264cae09dba7e53875132c0c..6716e60d4064b8fb28c02e63c2aa2e7d87b39bc0 100644
--- a/src/blc_loop.cpp
+++ b/src/blc_loop.cpp
@@ -96,7 +96,7 @@ static void blc_command_send_to_stdout(char const *argument){
     }
 }
 //We execute the argument and send it with prefix '&' to stdout if it is not a terminal
-static void blc_command_send_to_all(char const *argument){
+static void blc_command_send_to_all(char *argument){
     blc_command_interpret_string(argument, strlen(argument));
     if (blc_output_terminal==0){
     if (argument) SYSTEM_ERROR_CHECK(printf("&%s", argument), -1, NULL);
@@ -122,7 +122,7 @@ void blc_command_ask_quit(){
     }
 }
 
-static void step_forward_cb(const char* steps_nb_str, void*){
+static void step_forward_cb( char* steps_nb_str, void*){
     int  steps_nb, pos;
     if (steps_nb_str){
         if (sscanf(steps_nb_str, "%d%n", &steps_nb, &pos)!=1 || pos != (int)strlen(steps_nb_str) || steps_nb<1){
diff --git a/src/blc_program.cpp b/src/blc_program.cpp
index 77bdd243c6f686fcc7fb8bfe18b5e5decc37febf..21fafde3d062d608d42a0c994ed3f2269f0e4feb 100644
--- a/src/blc_program.cpp
+++ b/src/blc_program.cpp
@@ -143,10 +143,7 @@ void blc_program_add_option(char const **result, char letter, char const *long_o
     tmp_program_option.help = help;
     tmp_program_option.default_value = default_value;
     
-    
     program_options.push_back(tmp_program_option);
-
-
 }
 
 void blc_program_add_input_pipe_option(FILE *file, char letter, char const *long_option, char const *help, char* default_value)