# Error while compiling

**URL:** <https://forum.arduino.cc/t/error-while-compiling/702190>\
**Category:** Portenta H7\
**Created:** [March 27, 2021, 3:58pm UTC](https://forum.arduino.cc/t/error-while-compiling/702190 "2021-03-27T15:58:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![siddimanq1234](https://avatars.discourse-cdn.com/v4/letter/s/848f3c/32.png) [@siddimanq1234](https://forum.arduino.cc/u/siddimanq1234)\
**Post date:** [March 27, 2021, 3:58pm UTC](https://forum.arduino.cc/t/error-while-compiling/702190/1 "2021-03-27T15:58:46Z")

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I just got my hands on the Arduino Portenta and I selected that board under Tools\>\>Board and selected the right port. I also have the latest Arduino IDE software. When I plug in the portenta, the green and blue LED start blinking. But when I try to upload a simple Blink sketch, the portenta appears to go into bootloader mode (the green led starts flashing) and I get the following error:

_dfu-util 0.9_

_Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc._  
_Copyright 2010-2020 Tormod Volden and Stefan Schmidt_  
_This program is Free Software and has ABSOLUTELY NO WARRANTY_  
_Please report bugs to [http://sourceforge.net/p/dfu-util/tickets/](http://sourceforge.net/p/dfu-util/tickets/)_

_Invalid DFU suffix signature_  
_A valid DFU suffix will be required in a future dfu-util release!!!_  
_Cannot open DFU device 2341:035b_  
_Cannot open DFU device 2341:035b_  
_No DFU capable USB device available_  
_An error occurred while uploading the sketch_

How can I resolve this? :o

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**Author:** ![groundFungus](https://avatars.discourse-cdn.com/v4/letter/g/73ab20/32.png) [@groundFungus](https://forum.arduino.cc/u/groundFungus)\
**Post date:** [March 27, 2021, 4:39pm UTC](https://forum.arduino.cc/t/error-while-compiling/702190/2 "2021-03-27T16:39:34Z")

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There is an [Arduino Portenta section](https://forum.arduino.cc/index.php?board=148.0) of the forum.

You may get help quicker if you have a moderator move your post to that section. Make the request using the Report to moderator button below each post.

Do not make another post in that section. That is cross posting and cross posting is against the rules.

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**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\
**Post date:** [July 25, 2021, 4:40pm UTC](https://forum.arduino.cc/t/error-while-compiling/702190/3 "2021-07-25T16:40:13Z")

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