redis Error : ERR wrong number of arguments for 'set' command

i have an error with redis set command on local redis server(127.0.0.1:6379)

versions:

npm version : 2.15.0;
node version : 4.4.2;
nodejs verison : 0.10.25;
redis version : 2.7.1;

Error:

events.js:141 throw er; // Unhandled 'error' event
ReplyError: ERR wrong number of arguments for 'set' command at parseError 
(/opt/xxx/xxx/node_modules/redis/node_modules/redis 
parser/lib/parser.js:193:12) at parseType 
(/opt/xxx/xxx/node_modules/redis/node_modules/redis-
parser/lib/parser.js:303:14)

any help?

via Nir Konky