Break your code into pieces & test which one is creating issue.
What I believe you dont have UPTIME property based on the other question you have posted & thats cause of relevance failure.
Q: ((names of it, ids of it, operating systems of it, concatenation "|" of (ip addresses of it as string), ( concatenation "" of substrings separated by "," of it) of ( last report time of it as string), value of result from (bes property "Uptime in Days") of it) of bes computers whose ( name of it as lowercase = "MY Machines"))
A: My Machine, 4267590, Win2012R2 6.3.9600, 1.2.1.2|1.1.1.1, Fri 27 Aug 2021 05:04:21 -0500, 0
This is the bit which I have & I changed from code -
value of result from (bes property “Uptime in Days”) of it
Apart from it you can do it more safely using below -
Q: ((name of it as string | "Not Reported", id of it as string | "Not Reported", operating system of it as string | "Not Reported", concatenation "|" of (ip addresses of it as string) | "Not Reported", ( concatenation "" of substrings separated by "," of it) of ( last report time of it as string) | "Not Reported", value of result from (bes property "Uptime in Days") of it | "Not Reported") of bes computers whose ( name of it as lowercase = "my machine"))
A: My machine, 4267590, Win2012R2 6.3.9600, 1.2.1.1|1.2.1.1, Fri 27 Aug 2021 05:19:50 -0500, 0