Processing Error - Error while writing camera indices into file

My problem is a little bit strange, 1 step is finished normally, without errors, 2 step crash almost at the end of processing. What is wrong with this? Photos from Sony alpha 6000, GSD 1 cm, good overlap 50/70%.

 

 

 

[UI]: Show Quality Report clicked.

[UI]: Save Project clicked.

[UI]: Processing Options clicked.

Processing: Substep Dense matching started.

Processing: Dense matching

Processing: Dense Processing

Processing: Checking cameras

Processing: Processing group group1

Processing: Group group1, cluster 1 : initializing 91 cameras

Processing: Group group1, cluster 1 : initializing 154546 points

Processing: Group group1, cluster 1 : optimizing 16363647 points [1/3]

Processing: Group group1, cluster 1 : optimizing 15611799 points [2/3]

Processing: Group group1, cluster 1 : optimizing 15136883 points [3/3]

Processing: Group group1, cluster 1 : finalizing 15049843 points

Processing: Group group1, cluster 1 : checking 15049843 points

[Error]: Error while writing camera indices into file <R:\Drony\02_Projekty\04_Pix4D\projekty/wn_5/temp/dense/wn_5_group1_data_part_1.tmp>

[Error]: Failed to write cluster Vis file <R:\Drony\02_Projekty\04_Pix4D\projekty/wn_5/temp/dense/wn_5_group1_data_part_1.tmp>

[Error]: Processing group group1 failed!

[Error]: >>>Processing group group1<<< failed with error (failed to run a step!)!

[Error]: >>>Processing group group1<<< failed with error (failed to run a step!)!

[Error]: Dense Processing failed!

[Error]: >>>Dense Processing<<< failed with error (failed to run a step!)!

[Error]: >>>Dense Processing<<< failed with error (failed to run a step!)!

[Error]: Dense matching failed!

[Error]: >>>Dense matching<<< failed with error (failed to run a step!)!

[Error]: >>>Dense matching<<< failed with error (failed to run a step!)!

Processing: Substep Dense matching finished.

[UI]: Save Project clicked.

Dear Lukas,

Please check to you have enough space to write the necessary files. 

Can you reproduce this error on other projects or does it only happen on this particular project?

Please send us your logfile at support@pix4d.com (and mention this forum post): we will have a look. 

Best regards,