+ echo 'Generating flat PNG using a width of 606.0848861409858 mm'
+ /app/bin/flat -o /working/7f8671c3-9992-438f-a696-7eda3b641cdc/flat.png /working/7f8671c3-9992-438f-a696-7eda3b641cdc/processing/data/profile.pdd.dat /working/shape.shp 606.0848861409858 10.0
Generating flat PNG using a width of 606.0848861409858 mm
2026/01/22 23:14:09 Calculations (Go) v0.0.3
panic: runtime error: index out of range [0] with length 0

goroutine 1 [running]:
gitlab.com/redzonerobotics/processing/calculations-go/src/calculations.ColourizeFlat({0x6f6020?, 0x0?, 0x7ffc501e64ad?}, 0x2?, 0xc00011be88?, 0x1?)
	/app/src/calculations/flat.go:192 +0x199
main.main()
	/app/tools/flat/main.go:156 +0x9f2