diff --git a/iocBoot/iocLinux/areaDetector.cmd b/iocBoot/iocLinux/areaDetector.cmd
index 8350d6831575d3ff1fd605cbc2fc239c032d95db..92f3bcefc11e1b62350810dd8eb0d65aebd68de8 100644
--- a/iocBoot/iocLinux/areaDetector.cmd
+++ b/iocBoot/iocLinux/areaDetector.cmd
@@ -1,3 +1,5 @@
+epicsEnvSet EPICS_CA_MAX_ARRAY_BYTES 2000100
+
 # Create a simDetector driver
 simDetectorConfig("SIM1", 640, 480, 1, 50, 50000000)
 dbLoadRecords("$(AREA_DETECTOR)/ADApp/Db/ADBase.template",     "P=xxx:,R=SIM1:cam1:,PORT=SIM1,ADDR=0,TIMEOUT=1")