attempt to concatenate nil and string

[Platonic]

I have some weird issue, this is the first time I counter this error and it makes no since to me, everything I believe I ddi correct, but im not sure but I think this is because I maby at the maximum of my menu...have a look at the error...it search the value, but asoon as it start searching afher "gg.toast('enjoy') it ill show it results and then give this error: 
 

local old = gg.getRanges();
gg.setRanges(gg.REGION_ANONYMOUS)
gg.searchNumber('25.0E;50.0E;100.0E;200.0E;400.0E;800.0E;1,600.0E;3,200.0E;6,400.0E;12,800.0E;25,600.0E;51,200.0E;102,400.0E;204,800.0E;409,600.0E;819,200.0E;1,638,400.0E;3,276,800.0E;6,553,600.0E;13,107,200.0E;26,214,400.0E;52,428,800.0E;104,857,600.0E;209,715,200.0E;419,430,400.0E;838,860,800.0E;1,677,721,600.0E;3,355,443,200.0E;6,710,886,400.0E::2065', gg.TYPE_DOUBLE)
t = gg.getResults(29)
gg.addListItems(t)
gg.clearResults()
gg.searchNumber('34.25F;38.25F;42.25F;46.25F;50.25F;54.25F;58.25F;62.25F;68.5F;76.5F;84.5F;92.5F;100.5F;108.5F;116.5F;124.5F:1141', gg.TYPE_FLOAT)
r = gg.getResults(16)
gg.addListItems(r)
gg.toast('Part 2 complete')
gg.sleep(1000)
gg.toast('enjoy')
gg.clearResults()
gg.searchNumber('2;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(2, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('4;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(4, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('6;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(6, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('8;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(8, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('10;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(10, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('10;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(12, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('14;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(14, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('16;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(16, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('18;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(18, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('20;240D;1,120D;372D;300D::', gg.TYPE_DWORD)
gg.searchNumber(20, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.clearResults()
gg.searchNumber('0;240D;1,120D;372D;300D::512', gg.TYPE_DWORD)
gg.searchNumber(0, gg.TYPE_DWORD)
b = gg.getResults(50)
gg.addListItems(b)
gg.setRanges(old)

 

 

on = '[ON]'
off = '[OFF]'
fish5 = off
fish6 = off
fish7 = off
fish8 = off
fish9 = off
fish10 = off
fish11 = off
fish12 = off
fish13 = off
fish14 = off
fish15 = off
fish16 = off
fish17 = off
fish18 = off
fish19 = off
fish20 = off
fish21 = off
fish22 = off
fish23 = off
fish24 = off
fish25 = off
fish26 = off
fish27 = off
fish28 = off
fish29 = off
fish30 = off
fish31 = off
fish32 = off
fish33 = off
fish34 = off
fish35 = off
fish36 = off
fish37 = off
fish38 = off
fish39 = off
fish40 = off
fish41 = off
fish42 = off
fish43 = off
fish44 = off
fish45 = off
fish46 = off
fish47 = off
fish48 = off
fish49 = off
speed = off
river = off








normaly it is supposed to work like I made it...

@saiaapiz
@CmP

[CmP]

Make sure that the variable "river" is defined before it is used.