Kinetis K10 /J-Link: Loading Flash error

My target device is MK10DX128xxx5 over SWD. On trying to load code, I only get this far:

Load "C:\\work\\freescale\\Bluetopia_K10\\Samples\\Swatch1B\\projects\\uv4\\Objects\\Swatch1B.axf"
Set JLink Project File to "C:\work\freescale\Bluetopia_K10\Samples\Swatch1B\projects\uv4\JLinkSettings.ini"
* JLink Info: Device "MK10DX128XXX5" selected (160 KB flash, 16 KB RAM).

JLink info:
------------
DLL: V4.74a, compiled Jul 23 2013 08:47:58
Firmware: J-Link V9 compiled Jan 10 2014 19:51:25
Hardware: V9.00
S/N : [REDACTED]
Feature(s) : GDB

* JLink Info: Found SWD-DP with ID 0x2BA01477
* JLink Info: Found SWD-DP with ID 0x2BA01477
* JLink Info: TPIU fitted.
* JLink Info: ETM fitted.
* JLink Info: ETB present.
* JLink Info: CSTF present.
* JLink Info: FPUnit: 6 code (BP) slots and 2 literal slots
* JLink Info: Found Cortex-M4 r0p1, Little endian.
Found SWD-DP with ID 0x2BA01477
Unlocking device...
ROMTableAddr = 0xE00FF003

... Followed by an "Unknown Error" popup and "Error: Flash download failed".

The last few lines of JLinkLog.txt suggest it's failing to read memory:

T1754 000:476 JLINK_GetDeviceFamily()  returns 14 (0000ms, 0243ms total)
T1754 000:478 JLINK_ReadMem (0xE00FFFF0, 0x0010 Bytes, ...) -- CPU is running -- CPU_ReadMem(16 bytes @ 0xE00FFFF0) -- Data:  AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA  returns 0x01 (0003ms, 0246ms total)
T1754 000:481 JLINK_ReadMem (0xE00FFFD0, 0x0020 Bytes, ...) -- CPU is running -- CPU_ReadMem(32 bytes @ 0xE00FFFD0) -- Data:  AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA ...  returns 0x01 (0002ms, 0248ms total)
T1754 022:172 JLINK_Close() >0x42 TIF> >0x28 TIF> >0x0D TIF> >0x21 TIF> (0019ms, 0267ms total)
T1754 022:192 JLINK_Close() (0000ms, 0267ms total)
T1754 022:193 JLINK_Close() (0000ms, 0267ms total)

... in the past this has worked when I set the target type to Generic Cortex-M4, but that type is no longer available after my most recent license renewal.
Does this sound familiar to anyone?