# ADACMP Decompress MU **URL:** \ **Category:** Forum\ **Tags:** Adabas-Natural, Adabas, Adabas-on-Mainframes, Adabas-Basics-on-Mainframes\ **Created:** [June 28, 2012, 11:25pm UTC](https://techcommunity.softwareag.com/t/adacmp-decompress-mu/100843 "2012-06-28T23:25:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![STomsko](https://avatars.discourse-cdn.com/v4/letter/s/848f3c/32.png) [@STomsko](https://techcommunity.softwareag.com/u/STomsko)\ **Post date:** [June 28, 2012, 11:25pm UTC](https://techcommunity.softwareag.com/t/adacmp-decompress-mu/100843/1 "2012-06-28T23:25:21Z")
Anyone? On a decompress – What does the one-byte before an MU field represent. As far as I can tell, it is not the number of occurrences, nor the max occurrences. What is it? I am getting hex values of either ‘23’, ‘02’, and ‘00’ – no other values are present on a file with 237000 records – and even the ‘00’ is showing one occurrence of blanks. The max occurrences possible for any record is 2. ---
**Author:** ![system](https://global.discourse-cdn.com/techcommunity/original/3X/c/d/cd19967bb605d28a72d77eb83a1cae22f3df2eb8.svg) [@system](https://techcommunity.softwareag.com/u/system)\ **Post date:** [June 28, 2012, 11:46pm UTC](https://techcommunity.softwareag.com/t/adacmp-decompress-mu/100843/2 "2012-06-28T23:46:27Z")
In theory the count byte should match the data, unless you specify a fixed number of occurrences for the unload. Otoh you shouldn’t see a count of 0 as “ADACMP generates a count of 1 if the MU field or PE group is empty” So we’d need to see actual data to try to track it down. Note: “The max occurrences possible for any record is 2” doesn’t mean anything, anyone writing an adhoc program with a view specifying more than 2 will be able to fill it to the max, depending on the Adabas version, the setting of MUPEX/MUPECOUNT yada yada. ---
**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, 3:02pm UTC](https://techcommunity.softwareag.com/t/adacmp-decompress-mu/100843/3 "2021-04-02T15:02:06Z")