ERROR - SQL Error '[Cache ODBC][State : S1000][Native Code 29]

I have been using the query below and it was working fine but now it's giving a SQL error. There were no changes made that could cause this to stop working. There is no Field 'APPLICATIONID' in the table.

QueueSQL=select distinct (convert(char(5),SkillsetID)+'='+Skillset) from iagentbySkillsetStat where ApplicationID > 10000
QueueMappingSQL=SELECT DISTINCT (convert(char(5),SkillsetID)+'='+Skillset), SkillsetID FROM iagentbySkillsetStat iagentbySkillsetStat WHERE (iagentbySkillsetStat.ApplicationID>10000)

DB- Intersystems Cache

Error details for the log files are below.

14/09/2016 11:20:05 a.m. > ERROR - SQL Error '[Cache ODBC][State : S1000][Native Code 29]
[C:\xlink\xlink Compiled Package\Xlink Application\Isps_Ul.exe]
[SQLCODE: <-29>:]
[Cache Error: <errdone+2^%qaqqt>]
[Details: ]
[%msg: < SQL ERROR #29: Field 'APPLICATIONID' not found in the applicable tables^select distinct ( convert ( char ( 5 ) , SkillsetID ) + :%qpar(1) + Skillset ) from iagentbySkillsetStat where ApplicationID >>]'

Thanks in advance.