We worked around it by explicitly closing files.
Also we had a user add CALL(AMODE31) to program PARM. That worked.
BUFNO as defined in the Easytrieve r11.6 Installation Guide.
We recommend that you specify the number of I/O buffers for each sequential file by using the BUFNO option. You can override the Options Table value through the BUFNO parameter of the FILE statement. The default BUFNO is 2. You can specify BUFNO from 0 to 255.
Specifying more buffers for a large sequential file permits your job to run faster.
VFM and VSAM files do not use the BUFNO information.