Q:

Magento 2 data migration table or view not found

I'm migrating Magento 1.7.2 to Magento 2.3.4 with respect to Magento data migration documentation.  However I'm getting below error after post processing. 
SQLSTATE[42S02]: Base table or view not found: 1146 Table 'mgn_' doesn't exist, query was: SELECT COUNT(*) FROM  mgn_

I'm unable to figure out issue, since error comes with prefix alone and no table is mentioned. 

[WARNING]: Mismatch of entities in the document: mgn_inventory_source_item Source: 3311 Destination: 3307
  [WARNING]: Volume Check failed
[INFO][mode: data][stage: data migration][step: PostProcessing Step]: started
  92% [=========================>--] Remaining Time: 1 sec In Mysql.php line 110:
SQLSTATE[42S02]: Base table or view not found: 1146 Table 'mgn_' doesn't exist, query was: SELECT COUNT(*) FROM mgn_

A:

Issue is reproducible in Magento 2.3.4 only.  I have created issue in [github][1] and it has been addressed.  

https://github.com/magento/data-migration-tool/issues/791

