# OPC COM connection between 64 and 32 bit systems

**URL:** <https://forum.inductiveautomation.com/t/opc-com-connection-between-64-and-32-bit-systems/11143>\
**Category:** Ignition\
**Created:** [January 29, 2016, 11:13am UTC](https://forum.inductiveautomation.com/t/opc-com-connection-between-64-and-32-bit-systems/11143 "2016-01-29T11:13:11Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![ivanfomin1977](https://avatars.discourse-cdn.com/v4/letter/i/e95f7d/32.png) [@ivanfomin1977](https://forum.inductiveautomation.com/u/ivanfomin1977)\
**Post date:** [February 2, 2016, 3:11pm UTC](https://forum.inductiveautomation.com/t/opc-com-connection-between-64-and-32-bit-systems/11143/3 "2016-02-02T15:11:51Z")

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The point is that I can connect to deltaV servers only after installing DeltaV OPC Remote on Ignition side.  
It is ok using 32 bit ignition, but if I set java memory heap size more than 1.5 Gb, gateway doesn’t start or hangs just after start. I can enlarge ammout of memory for 64 bit java and ignition but then i loose connection with Deltav sources.  
One of two problems is to be settled.

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