Need help with a script that fails on some routers

RouterOS Scripting
1

This is just part of a bigger script, but for some reason it starts to log error to the log when this part is run.

When cut/paste this to a terminal on a hex (750g3) router:

{
:local CmdHistory true
:local train [:tonum [:pick [/system resource get version] 0 1]] 

:if ($train > 6 and $CmdHistory) do={
:global cmd
:local f 0
:foreach i in=[/system history find] do={
:if ($i = $cmd) do={ :set f 1 }
:if ($f != 1) do={
:put "StartCMD"
:put [/system history get $i]
:put "EndCMD"
}
}
:global cmd  [:pick [/system history find] 0]
}
}

I get the error marked in red:

[admin@750] > {
{… :local CmdHistory true
{… :local train [:tonum [:pick [/system resource get version] 0 1]]
{…
{… :if ($train > 6 and $CmdHistory) do={
{{… :global cmd
{{… :local f 0
{{… :foreach i in=[/system history find] do={
{{{… :if ($i = $cmd) do={ :set f 1 }
{{{… :if ($f != 1) do={
{{{{… :put “StartCMD”
{{{{… :put [/system history get $i]
{{{{… :put “EndCMD”
{{{{… }
{{{… }
{{… :global cmd [:pick [/system history find] 0]
{{… }
{… }
interrupted
error - contact MikroTik support and send a supout file (10)
[admin@750] >

Even if this part give error message, rest of script runs fine. It may be a bug on one of my router.

2

It works on 7.14beta8 on RB1100AHx4. It does not have a long history (4 records). But $cmd has a value at end without error and :put did there thing.

All my hEX-S run Dude+V6, so can’t test it there. So if it’s platform/version thing, IDK…

3

Strange thing that it only seems to be one router with problem.
RB951 with 17.3.3 works fine.

4

Maybe is some memory stack issue with large history on that device… Regarding code, you can optimize loop using :while instead :foreach to iterate while condition $f!=1

5

All script error did go a way after upgrading from 7.13.3 to 7.13.4

6

Error still there in 7.14.1 …

[eddieb@ccr1009] > /system/history/print 

error - contact MikroTik support and send a supout file (10)

It might indeed have something to do with the size of the history.
On my CCR there is a lot of history and it gives that error
On a HAPAX3 I had this error and a couple of hours later it was gone
SUP-148095 created