The University of Akron has large collection of B-26 material including the Henry C Beck Collection. Beck was the Chief Photo Intelligence Officer of the 397th BG. See this link:
http://ead.ohiolink.edu/xtf-ead/view...;brand=default
Listed in the collection (BOX 3 / Folder 50) are the strike photos and mission reports for
Schrembeck communications center - p.m., March 23, 1945
I have no idea how much is in his collection and perhaps you are already aware of this material. There may not be anything related to the mission "failures" on that date, but it might be worth checking it out if that has not been done.