Please provide your actual SQL view. The expression looks fine.
SELECT tblIncidentLog.Date, tblIncidentLog.CallDetail, Count(tblIncidentLog.
CallDetail) AS CountOfCallDetail, tblDetails.IsOther
FROM tblIncidentLog, tblDetails
GROUP BY tblIncidentLog.Date, tblIncidentLog.CallDetail, tblDetails.IsOther
HAVING (((tblIncidentLog.Date) Between [Forms].[frmDistrictReport].[Start]
And [Forms].[frmDistrictReport].[End]) AND ((tblIncidentLog.CallDetail)
="Alcohol Abuse" Or (tblIncidentLog.CallDetail)="Allergic Reaction" Or
(tblIncidentLog.CallDetail)="Anxiety Attack" Or (tblIncidentLog.CallDetail)
="Childbirth - Delivery at Scene" Or (tblIncidentLog.CallDetail)="Childbirth -
Delivery Enroute" Or (tblIncidentLog.CallDetail)="Childbirth - Prior
Delivery" Or (tblIncidentLog.CallDetail)="Choking" Or (tblIncidentLog.
CallDetail)="CPR - Continued Through Transport" Or (tblIncidentLog.CallDetail)
="CVA / TIA Signs and Symptoms" Or (tblIncidentLog.CallDetail)="Diabetic
Emergency" Or (tblIncidentLog.CallDetail)="Difficulty Swallowing" Or
(tblIncidentLog.CallDetail)="Leg Infection" Or (tblIncidentLog.CallDetail)
="Medical Alarm - UTL" Or (tblIncidentLog.CallDetail)="Medication Reaction"
Or (tblIncidentLog.CallDetail)="Nose Bleed - Controlled" Or (tblIncidentLog.
CallDetail)="Nose Bleed - Uncontrolled" Or (tblIncidentLog.CallDetail)="GI
Bleed" Or (tblIncidentLog.CallDetail)="Miscarriage / Vaginal Bleeding" Or
(tblIncidentLog.CallDetail)="Diarrhea - Extended" Or (tblIncidentLog.
CallDetail)="General Weakness" Or (tblIncidentLog.CallDetail)="Misc. Medical
Incident" Or (tblIncidentLog.CallDetail)="Shaking" Or (tblIncidentLog.
CallDetail)="Cardiac Chest Pain" Or (tblIncidentLog.CallDetail)="Cardiac
Dysrhythmia" Or (tblIncidentLog.CallDetail)="Hypertension" Or (tblIncidentLog.
CallDetail)="Hypotension" Or (tblIncidentLog.CallDetail)="Irregular Heart
Beat" Or (tblIncidentLog.CallDetail)="SOB - Asthma" Or (tblIncidentLog.
CallDetail)="SOB - CHF" Or (tblIncidentLog.CallDetail)="SOB - COPD" Or
(tblIncidentLog.CallDetail)="SOB - Hyperventilation" Or (tblIncidentLog.
CallDetail)="11-44 - Terminated Enroute" Or (tblIncidentLog.CallDetail)
="Abdominal Pain" Or (tblIncidentLog.CallDetail)="Psychiatric - 5150 by Law
Enforcement" Or (tblIncidentLog.CallDetail)="Seizure" Or (tblIncidentLog.
CallDetail)="11-44 - Non-Initiation" Or (tblIncidentLog.CallDetail)="11-44 -
Terminated At Scene" Or (tblIncidentLog.CallDetail)="SOB - Other" Or
(tblIncidentLog.CallDetail)="CVA / TIA Signs and Symptoms" Or (tblIncidentLog.
CallDetail)="Dizziness" Or (tblIncidentLog.CallDetail)="Syncope" Or
(tblIncidentLog.CallDetail)="Altered LOC") AND ((tblDetails.IsOther)=If
("IsOther","Other",[CallDetail])));