Help im new to phones and mine is "Soft bricked" (PLEASE HELP :) )

My samsung galaxy s3 mini was rooted and my friend gave it to me and i didnt know that i was rooted so i just went into backup and reset and now when i turn it on it is in a constant "bootloop" on the loading screen for att ive tried to use odin but this is the error i get

<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> I747UCUEMJB_2024954_REV04_user_low_ship.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/004> Odin v.3 engine (ID:4)..
<ID:0/004> File analysis..
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Set PIT file..
<ID:0/004> DO NOT TURN OFF TARGET!!
<ID:0/004>
<ID:0/004> Re-Partition operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)

i dont know what to do but if anyone can help me please :) thank you so much in advance