diff --git a/client/cliparser/cliparser.c b/client/cliparser/cliparser.c
index 56be2ca6..931d68cd 100644
--- a/client/cliparser/cliparser.c
+++ b/client/cliparser/cliparser.c
@@ -153,23 +153,14 @@ void CLIParserFree() {
 // convertors
 int CLIParamHexToBuf(struct arg_str *argstr, uint8_t *data, int maxdatalen, int *datalen) {
 	*datalen = 0;
-	if (!argstr->count)
-		return 0;
 	
-	char buf[256] = {0};
 	int ibuf = 0;
+	uint8_t buf[256] = {0};
+	int res = CLIParamStrToBuf(argstr, buf, maxdatalen, &ibuf);
+	if (res || !ibuf)
+		return res;
 	
-	for (int i = 0; i < argstr->count; i++) {
-		int len = strlen(argstr->sval[i]);
-		memcpy(&buf[ibuf], argstr->sval[i], len);
-		ibuf += len;
-	}
-	buf[ibuf] = 0;
-  
-	if (!ibuf)
-		return 0;
-	
-	switch(param_gethex_to_eol(buf, 0, data, maxdatalen, datalen)) {
+	switch(param_gethex_to_eol((char *)buf, 0, data, maxdatalen, datalen)) {
 	case 1:
 		printf("Parameter error: Invalid HEX value.\n");
 		return 1;
@@ -184,5 +175,31 @@ int CLIParamHexToBuf(struct arg_str *argstr, uint8_t *data, int maxdatalen, int
 	return 0;
 }
 
+int CLIParamStrToBuf(struct arg_str *argstr, uint8_t *data, int maxdatalen, int *datalen) {
+	*datalen = 0;
+	if (!argstr->count)
+		return 0;
+	
+	uint8_t buf[256] = {0};
+	int ibuf = 0;
+	
+	for (int i = 0; i < argstr->count; i++) {
+		int len = strlen(argstr->sval[i]);
+		memcpy(&buf[ibuf], argstr->sval[i], len);
+		ibuf += len;
+	}
+	buf[ibuf] = 0;
+  
+	if (!ibuf)
+		return 0;
+
+	if (ibuf > maxdatalen)
+		return 2;
+	
+	memcpy(data, buf, ibuf);
+	*datalen = ibuf;
+	
+	return 0;
+}
 
 
diff --git a/client/cliparser/cliparser.h b/client/cliparser/cliparser.h
index 7c1ced20..2f5ac317 100644
--- a/client/cliparser/cliparser.h
+++ b/client/cliparser/cliparser.h
@@ -25,8 +25,9 @@
 #define arg_strx0(shortopts, longopts, datatype, glossary) (arg_strn((shortopts), (longopts), (datatype), 0, 250, (glossary)))
 
 #define CLIExecWithReturn(cmd, atbl, ifempty) if (CLIParserParseString(cmd, atbl, arg_getsize(atbl), ifempty)){CLIParserFree();return 0;}
-#define CLIGetStrBLessWithReturn(paramnum, data, datalen, delta) if (CLIParamHexToBuf(arg_get_str(paramnum), data, sizeof(data) - (delta), datalen)) {CLIParserFree();return 1;}
-#define CLIGetStrWithReturn(paramnum, data, datalen) if (CLIParamHexToBuf(arg_get_str(paramnum), data, sizeof(data), datalen)) {CLIParserFree();return 1;}
+#define CLIGetHexBLessWithReturn(paramnum, data, datalen, delta) if (CLIParamHexToBuf(arg_get_str(paramnum), data, sizeof(data) - (delta), datalen)) {CLIParserFree();return 1;}
+#define CLIGetHexWithReturn(paramnum, data, datalen) if (CLIParamHexToBuf(arg_get_str(paramnum), data, sizeof(data), datalen)) {CLIParserFree();return 1;}
+#define CLIGetStrWithReturn(paramnum, data, datalen) if (CLIParamStrToBuf(arg_get_str(paramnum), data, sizeof(data), datalen)) {CLIParserFree();return 1;}
 
 extern int CLIParserInit(char *vprogramName, char *vprogramHint, char *vprogramHelp);
 extern int CLIParserParseString(const char* str, void* argtable[], size_t vargtableLen, bool allowEmptyExec);
@@ -35,3 +36,4 @@ extern int CLIParserParseArg(int argc, char **argv, void* argtable[], size_t var
 extern void CLIParserFree();
 
 extern int CLIParamHexToBuf(struct arg_str *argstr, uint8_t *data, int maxdatalen, int *datalen);
+extern int CLIParamStrToBuf(struct arg_str *argstr, uint8_t *data, int maxdatalen, int *datalen);
diff --git a/client/cmdhf14a.c b/client/cmdhf14a.c
index 06a17c2f..8e507ebe 100644
--- a/client/cmdhf14a.c
+++ b/client/cmdhf14a.c
@@ -790,7 +790,7 @@ int CmdHF14AAPDU(const char *cmd) {
 	leaveSignalON = arg_get_lit(2);
 	decodeTLV = arg_get_lit(3);
 	// len = data + PCB(1b) + CRC(2b)
-	CLIGetStrBLessWithReturn(4, data, &datalen, 1 + 2);
+	CLIGetHexBLessWithReturn(4, data, &datalen, 1 + 2);
 
 
 	CLIParserFree();
diff --git a/client/emv/cmdemv.c b/client/emv/cmdemv.c
index 70251973..0f5906ac 100644
--- a/client/emv/cmdemv.c
+++ b/client/emv/cmdemv.c
@@ -60,7 +60,7 @@ int CmdHFEMVSelect(const char *cmd) {
 	bool leaveSignalON = arg_get_lit(2);
 	bool APDULogging = arg_get_lit(3);
 	bool decodeTLV = arg_get_lit(4);
-	CLIGetStrWithReturn(5, data, &datalen);
+	CLIGetHexWithReturn(5, data, &datalen);
 	CLIParserFree();
 	
 	SetAPDULogging(APDULogging);
@@ -205,7 +205,7 @@ int CmdHFEMVGPO(const char *cmd) {
 	bool dataMakeFromPDOL = arg_get_lit(3);
 	bool APDULogging = arg_get_lit(4);
 	bool decodeTLV = arg_get_lit(5);
-	CLIGetStrWithReturn(6, data, &datalen);
+	CLIGetHexWithReturn(6, data, &datalen);
 	CLIParserFree();	
 	
 	SetAPDULogging(APDULogging);
@@ -294,7 +294,7 @@ int CmdHFEMVReadRecord(const char *cmd) {
 	bool leaveSignalON = arg_get_lit(1);
 	bool APDULogging = arg_get_lit(2);
 	bool decodeTLV = arg_get_lit(3);
-	CLIGetStrWithReturn(4, data, &datalen);
+	CLIGetHexWithReturn(4, data, &datalen);
 	CLIParserFree();
 	
 	if (datalen != 2) {
@@ -372,7 +372,7 @@ int CmdHFEMVAC(const char *cmd) {
 	bool dataMakeFromCDOL = arg_get_lit(5);
 	bool APDULogging = arg_get_lit(6);
 	bool decodeTLV = arg_get_lit(7);
-	CLIGetStrWithReturn(8, data, &datalen);
+	CLIGetHexWithReturn(8, data, &datalen);
 	CLIParserFree();	
 	
 	SetAPDULogging(APDULogging);
@@ -501,7 +501,7 @@ int CmdHFEMVInternalAuthenticate(const char *cmd) {
 	bool dataMakeFromDDOL = arg_get_lit(3);
 	bool APDULogging = arg_get_lit(4);
 	bool decodeTLV = arg_get_lit(5);
-	CLIGetStrWithReturn(6, data, &datalen);
+	CLIGetHexWithReturn(6, data, &datalen);
 	CLIParserFree();	
 	
 	SetAPDULogging(APDULogging);
@@ -1080,7 +1080,7 @@ int CmdHFEMVScan(const char *cmd) {
 	json_t *root;
 	json_error_t error;
 
-	CLIParserInit("hf emv save", 
+	CLIParserInit("hf emv scan", 
 		"Scan EMV card and save it contents to a file.", 
 		"It executes EMV contactless transaction and saves result to a file which can be used for emulation\n"
 			"Usage:\n\thf emv scan -at -> scan MSD transaction mode and show APDU and TLV\n"
@@ -1118,15 +1118,20 @@ int CmdHFEMVScan(const char *cmd) {
 
 	bool GenACGPO = arg_get_lit(9);
 	bool MergeJSON = arg_get_lit(10);
+	uint8_t relfname[250] ={0};
+	char *crelfname = (char *)relfname;
+	int relfnamelen = 0;
+	CLIGetStrWithReturn(11, relfname, &relfnamelen);
 	CLIParserFree();
 	
 	SetAPDULogging(showAPDU);
 	
 	// current path + file name
-	const char *relfname = "card.json"; 
-	char fname[strlen(get_my_executable_directory()) + strlen(relfname) + 1];
+	if (!strstr(crelfname, ".json"))
+		strcat(crelfname, ".json");
+	char fname[strlen(get_my_executable_directory()) + strlen(crelfname) + 1];
 	strcpy(fname, get_my_executable_directory());
-	strcat(fname, relfname);
+	strcat(fname, crelfname);
 
 	if (MergeJSON) {
 		root = json_load_file(fname, 0, &error);