supplied argument is not a valid stream resource? ERROR

[s0me0ne]

I am getting the error

flock(): supplied argument is not a valid stream resource in ______.inc

fwrite(): supplied argument is not a valid stream resource in ____.inc

I dont know what that means. I moved to a new webhost and maybe its how this new webhost is setup? 😕

[drew010]

most likely this is the result of a call to fopen failing, and not checking to see if the file was opened successfully.