Problems with Arduino IDE 1.6.7

Development Tools IDE 1.x
1

I have two issues with Arduino IDE 1.6.7 that have not been present with 1.6.5:

  • When I enter the boards manager, I get the error message:

  • package_index.json file signature verification failed*

  • Compilation of sketches for Arduino Due (actually the clone SainSmart Due) fail with the following message:

  • Arduino: 1.6.7 (Windows 7), TD: 1.27, Board: "Arduino Due (Programming Port)"*

  • Board arduino_due_x_dbg (platform sam, package arduino) is unknown*

  • Error compiling.*

The boards manager shows that Arduino SAM boards (32 Bit Arm-Cortex M3) by Arduino Version 1.6.5 are installed, but due to the first problem I cannot try to solve the the second one by upgrading to 1.6.6.

Does anybody have useful advice?

2

I don't know what caused the problems in the first place, but deinstalling the IDE, removing everything Arduino related from ...\AppData... and reinstalling the IDE solved it for me.