I just saw this in my log:
[Warning]: Warning w9020: GDAL Error <4> Unable to create png file //xxx/xxx/pix4d/Soltau_falcon/1_initial/report/html/ILCE-7R_ZeissSonnarT*FE35mmF2.8ZA(SEL35F28Z)_35.0_7360x4912 (RGB)(1)_pixel_error.png.
[Warning]:
[Error]: Failed to write to \<//xxx/xxx/pix4d/Soltau\_falcon/1\_initial/report/html/ILCE-7R\_ZeissSonnarT\*FE35mmF2.8ZA(SEL35F28Z)\_35.0\_7360x4912 (RGB)(1)\_pixel\_error.png
[Warning]: Warning w9020: GDAL Error \<4\> Unable to create png file //xxx/xxx/pix4d/Soltau\_falcon/1\_initial/report/html/ILCE-7R\_ZeissSonnarT\*FE35mmF2.8ZA(SEL35F28Z)\_35.0\_7360x4912 (RGB)(1)\_scaled\_pixel\_error.png.
[Warning]:
[Error]: Failed to write to \<//xxx/xxx/pix4d/Soltau\_falcon/1\_initial/report/html/ILCE-7R\_ZeissSonnarT\*FE35mmF2.8ZA(SEL35F28Z)\_35.0\_7360x4912 (RGB)(1)\_scaled\_pixel\_error.png
Looks like you need to truncate this. Trying to write a file with a name like that means trouble.