Print "no patch" when there is no more patches to occupy - netlogo

Question

I want to print "no path" when there is no more patches to occupy instead of warned by an Error "MOVE-TO expected input to be an agent but got NOBODY instead.". I did several things but did not work. Lastly, I did the following;
ask migrants
[let pot-target patches with [value < 11 and not any? turtles-here]
let target pot-target with [count neighbors with [any? turtles-here with [value < 11]] >= 1]
if target = 0 [print (word "no patch")]
if (target != 0 and (status != "resident")) [move-to min-one-of target [value]
set status "resident"
set color blue]
]
Here is the complete code
breed [migrants migrant]
breed [residents resident]
patches-own [value]
turtles-own [income
status]
to setup
ca
let total problo + probmid + probhi
if (total != 100)
[print (word "prob is more than 100")]
ask patches [set value random-normal 10 3
let patch-value value
set pcolor scale-color (gray - 5) patch-value 10 3]
ask patches
[if random 100 < 3
[sprout-residents 1
[set color red
set shape "default"
set size 1
set status "resident"
]
]
]
end
to go
ask patches
[if random 100 < 1
[sprout-migrants 1
[set color green
set shape "default"
set size 1
set status "migrant"
set-move
]]]
end
to set-move
ask migrants
[let pot-target patches with [value < 11 and not any? turtles-here]
let target pot-target with [count neighbors with [any? turtles-here with [value < 11]] >= 1]
if target = 0 [print (word "no patch")]
if (target != 0 and (status != "resident")) [move-to min-one-of target [value]
set status "resident"
set color blue]
]
end

Answer 1

You're mixing up an agentset and the count of the agents in that agentset. This line:
let target pot-target with [count neighbors with [any? turtles-here with [value < 11]] >= 1]
returns an agentset. So your variable "target" is all the patches that meet your conditions. If there are no patches that meet your conditions, then the agentset is not 0, but the count of the agentset is.
So you need to replace if target = 0 [print (word "no patch")] with if count target = 0 [print (word "no patch")] or with if not any? [print (word "no patch")].