Problems with Arduino IDE 1.6.7

[chessweb01]

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) fails 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.

[facchinm]

HI @chessweb01,
this happens because there are two (or zero) versions of sam core in your installation and the builder get confused.
I can suggest you to delete C:\\yourUsername\AppData\Local\Arduino15\packages\arduino\sam and C:\\yourUsername\AppData\Local\Arduino15\package_index.json, and also C:\\yourUsername\AppData\Roaming\Arduino15\ if you have it in your system.
Then closing and reopening the IDE should solve the issue.

[facchinm]

For reference: arduino/arduino-builder#84

[chessweb01]

Hi @facchinm, thanks for the quick response, but that didn't change anything.

First of all, I don't have C:\\yourUsername\AppData\Local\Arduino15\packages\arduino\sam folder, but rather a C:\\yourUsername\AppData\Local\Arduino15\packages\arduino\**hardware**\sam folder which I renamed. Deleting the other folder and the json-file didn't help either.

[facchinm]

Yes, sorry, I meant C:\\yourUsername\AppData\Local\Arduino15\packages\arduino\hardware\sam
You should have it, at least to show Arduino Due in the Boards menu

[chessweb01]

Yes, but as I said deleting it didn't change a thing. Still the same errors.

[facchinm]

Just to make sure, did you restart the IDE after deleting the folder? You shouldn't have any Arduino Due entry in the menu after restart, so no way to select it and cause the Board arduino_due_x_dbg (platform sam, package arduino) is unknown error

[chessweb01]

I went ahead and uninstalled Arduino IDE. After removing everything Arduino related from ...\AppData... I reinstalled Arduino IDE 1.6.7. That got rid of all my problems :-)

[facchinm]

A bit rough but functional 😉
I'm going to close this issue as "solved, don't know what happened" 😄