# Adabas 64 bit addressing **URL:** \ **Category:** Forum\ **Tags:** Adabas-Natural, Adabas, Adabas-on-Mainframes, Adabas-Basics-on-Mainframes\ **Created:** [July 20, 2006, 9:19pm UTC](https://techcommunity.softwareag.com/t/adabas-64-bit-addressing/58085 "2006-07-20T21:19:53Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Aylin\_Atasoy](https://avatars.discourse-cdn.com/v4/letter/a/6f9a4e/32.png) [@Aylin\_Atasoy](https://techcommunity.softwareag.com/u/Aylin_Atasoy)\ **Post date:** [July 20, 2006, 9:19pm UTC](https://techcommunity.softwareag.com/t/adabas-64-bit-addressing/58085/1 "2006-07-20T21:19:53Z")
Hi, when trying to start Adabas 7.4.3 with “MEMLIMIT” parameter over 2GB memory size, it gets ``` PARM- ERROR 45 detected during system open Getmain 16 MB Line failed Memory related parameters probably too big. ``` (LBP is set to 1400 MB ) Looking forward to hear you… Thanks. ---
**Author:** ![Bill\_Leeney](https://avatars.discourse-cdn.com/v4/letter/b/b5e925/32.png) [@Bill\_Leeney](https://techcommunity.softwareag.com/u/Bill_Leeney)\ **Post date:** [July 20, 2006, 10:40pm UTC](https://techcommunity.softwareag.com/t/adabas-64-bit-addressing/58085/2 "2006-07-20T22:40:26Z")
Hi, My understanding is that the Adabas buffer pool is always allocated in 31-bit storage above the 16M line, but below the 2G bar. The Adabas 7.4.x Release Notes explain how Adabas makes use of storage above the bar, in the section “Enhanced Support for Operating System Features”. HTH Bill ---
**Author:** ![system](https://global.discourse-cdn.com/techcommunity/original/3X/c/d/cd19967bb605d28a72d77eb83a1cae22f3df2eb8.svg) [@system](https://techcommunity.softwareag.com/u/system)\ **Post date:** [April 2, 2021, 2:39pm UTC](https://techcommunity.softwareag.com/t/adabas-64-bit-addressing/58085/3 "2021-04-02T14:39:02Z")