IDE says error uploading OTA to ESP8266, even tho' sketch uploads

I'm using the Arduino IDE v1.6.12 with an Adafruit ESP8266 Huzzah, 80 MHz, 4M (3M SPIFFS). No Arduino hardware involved.

I've successfully uploaded sketches with an FTDI for quite a while and recently tried "over the air" (OTA) uploads.

Even though the sketches do successfully upload "OTA," the IDE says:

Sketch uses 318,805 bytes (30%) of program storage space. Maximum is 1,044,464 bytes.
Global variables use 42,504 bytes (51%) of dynamic memory, leaving 39,416 bytes for local variables. Maximum is 81,920 bytes.
python.exe C:\Users\NewStdUser\Documents\Arduino\hardware\esp8266com\esp8266/tools/espota.py -i 192.168.1.44 -p 8266 --auth= -f C:\Users\NEWSTD~1\AppData\Local\Temp\arduino_build_720471/OTAFTPServer.ino.bin
Uploading...
14:53:01 [ERROR]: No Result!
14:53:01 [ERROR]: No Result!

Any idea about what's going on?

DaveEvans:
Any idea about what's going on?

No, but I've never experienced this problem in version 1.8.1 with ESP core v2.3.0. Maybe updating to the newest version will help?

Pieter

Thanks - will give that a try.