acquisition with step size 10 did crash:
(0 1080 2600 50605.30762918686d0)
Camera 1: Basler acA1920-25gm#00305315DFDD#192.168.4.100:3956
GrabSucceeded: 1
SizeX: 1024
SizeY: 1024
Gray value of first pixel: 1

(1 1080 2600 125360.72185238462d0)
Camera 2: Basler acA1920-25gm#00305315DFC4#192.168.6.101:3956
GrabSucceeded: 1
SizeX: 1024
SizeY: 1024
Gray value of first pixel: 2

Heap exhausted during garbage collection: 0 bytes available, 69712 requested.
 Gen StaPg UbSta LaSta LUbSt Boxed Unboxed LB   LUB  !move  Alloc  Waste   Trig    WP  GCs Mem-age
   0:     0     0     0     0     0     0     0     0     0        0     0 73400320    0   0  0.0000
   1:     0     0     0     0     0     0     0     0     0        0     0 73400320    0   0  0.0000
   2: 26891 68084     0     0   153 57312     0     0     0 1336781648 546231472 875458272    0   1  1.4001
   3: 220618 223999     0     0   415 158025     0     0    34 3685845088 1505916832 73400320  255   0  1.0882
   4:     0     0     0     0     0     0     0     0     0        0     0 73400320    0   0  0.0000
   5:     0     0     0     0   671  4884    42  1086  1109 172480160 46508384 245880480  630   1  0.0000
   6:     0     0     0     0  1257   155     0     0     0 46268416     0  2000000 1137   0  0.0000
   Total bytes allocated    = 5241375312
   Dynamic-space-size bytes = 7340032000
GC control variables:
   *GC-INHIBIT* = true
   *GC-PENDING* = true
   *STOP-FOR-GC-PENDING* = false
fatal error encountered in SBCL pid 31703(tid 140736528971520):
Heap exhausted, game over.

Error opening /dev/tty: No such device or address
Welcome to LDB, a low-level debugger for the Lisp runtime environment.
ldb>
hmm. still didn't run properly
(2 1170 3180 126956.76448183841d0)
Camera 1: Basler acA1920-25gm#00305315DFDE#192.168.5.102:3956
GrabSucceeded: 1
SizeX: 600
SizeY: 600
Gray value of first pixel: 21

Process inferior-lisp killed
with step 15 the ram is sufficient to store all data

(14 58 9 9 7 2014 2 NIL 0)
(37 18 11 9 7 2014 2 NIL 0)
Evaluation took:
  4823.373 seconds of real time
  10412.776000 seconds of total run time (10186.016000 user, 226.760000 system)
  [ Run times consist of 15.022 seconds GC time, and 10397.754 seconds non-GC time. ]
  215.88% CPU
  13,567,139,378,725 processor cycles
  61,959,058,192 bytes consed
store more information in the dat file
acquire and store average of dark images in the dat file