Scenarios that run in check but not in the analysis

[strahos]

Hello to everyone!
I am running DIYABC-RF_GUI_1.2.1. My data is around 1500 SNPs. I have already tried many scenarios that worked perfectly, but now I am stuck with some that only seem ok in check (before validation), but when I start the analysis it crashes. Scenarios 1 and 2 below always work, but not scenarios 3 and 4:

SCENARIO 1

N1 N2 N3 N4 N5 N6
0 sample 1
0 sample 2
0 sample 3
0 sample 4
0 sample 5
0 sample 6
t1 merge 4 6
t1 VarNe 4 Na1
t2 merge 4 5
t2 VarNe 4 Na2
t3 merge 4 3
t3 VarNe 4 Na3
t4 merge 4 2
t4 VarNe 4 Na4
t5 merge 4 1
t5 VarNe 4 Na5

SCENARIO 2

N1 N2 N3 N4 N5 N6 N7
0 sample 1
0 sample 2
0 sample 3
0 sample 4
0 sample 5
0 sample 6
t1 split 6 4 7 ra1
t2 split 5 2 7 ra2
tg merge 4 7
tg VarNe 4 Ng
t3 merge 4 3
t3 VarNe 4 Na3
t4 merge 4 2
t4 VarNe 4 Na4
t5 merge 4 1
t5 VarNe 4 Na5

SCENARIO 3

N1 N2 N3 N4 N5 N6 N7 N8
0 sample 1
0 sample 2
0 sample 3
0 sample 4
0 sample 5
0 sample 6
t1 split 5 7 8 ra1
t1 merge 2 7
t1 VarNe 2 Na1
t2 merge 4 6
t2 VarNe 4 Na2
t3 merge 4 8
t3 VarNe 4 Na3
t4 merge 4 3
t4 VarNe 4 Na4
t5 merge 4 2
t5 VarNe 4 Na5
t6 merge 4 1
t6 VarNe 4 Na6

SCENARIO 4

N1 N2 N3 N4 N5 N6 N7 N8 N9 N10
0 sample 1
0 sample 2
0 sample 3
0 sample 4
0 sample 5
0 sample 6
t1 split 5 7 8 ra1
t1 merge 6 7
t1 VarNe 6 Na1
t2 split 8 9 10 ra2
t2 merge 2 9
t2 VarNe 2 Na2
t3 merge 4 6
t3 VarNe 4 Na3
t4 merge 4 10
t4 VarNe 4 Na4
t5 merge 4 3
t5 VarNe 4 Na5
t6 merge 4 2
t6 VarNe 4 Na6
t7 merge 4 1
t7 VarNe 4 Na7

I leave all parameters at default and I add the following conditions:
t2>=t1
tg>t1
t4>t2
tg>t2

Then I run the simulation and it crashes. As I said, scenarios 1 and 2 work fine, it's the last two that won't work and I don't get it. Could someone please check the commands and tell me if I miss something?
Thanks!