oppo a7f flash file read error...

Operation : Read Firmware
Checking for existing devices...Not Found
Turn Off phone, hold Vol UP + Vol DOWN and insert USB cable.
Some phones may need Special Boot Cable or TestPoint for EDL mode.
Found Port : Qualcomm HS-USB QDLoader 9008 (COM13)
Driver Info : Qualcomm Incorporated, qcusbser.sys, 2.0.9.9
Connecting to phone...OK
Waiting for response...OK
Init Handshake Sequence...OK
Hardware ID : E1507000 [8916] 00000000
OPK_DATA : 9CBA94693C2333A562BCF0E0E981C558748817D002F543B2A2 6AB1B4B3F1CF9E
Initializing Protocol...OK
Using Auto Loader Selection [1]
Preparing Loader...Done
Sending Loader [8916_014]...Done
Executing Loader...OK
Detecting Chip Type...OK
Hardware : 8916, eMMC, 16 GB
LU Count : 1 [0x01D5A000]
WARNING! High Speed Driver is not installed.
Please install driver from QcFire\Drivers folder using Device Manager.
Payload Info : In: 65536 [4096], Out: 16384, Sector Size: 512
Reading Partition Table...OK
USERDATA : Normal
Reading Device Information...OK
Device : OPPO A37f [msm8916]
Software : A37fEX_11_171209, 1480422943 [Sat Dec 9 16:58:03 CST 2017]
Android Ver. : 5.1.1
Patch Level : 2017-12-01
Reading [modem]...Done
Reading [sec]...Done
Reading [sbl1]...Done
Reading [sbl1bak]...Done
Reading [aboot]...Done
Reading [abootbak]...Done
Reading [rpm]...Done
Reading [rpmbak]...Done
Reading [tz]...Done
Reading [tzbak]...Done
Reading [hyp]...Done
Reading [hypbak]...Done
Reading [oppodycnvbk]...Done
Reading [oppostanvbk]...Done
Reading [LOGO]...Done
Reading [boot]...Done
Reading [recovery]...Read Error!
Saved to : C:\Users\Chandan Sur\Desktop\New folder (3)\OPPO_A37f_A37fEX_11_171209_2017-12-01\
Operation Finished.