When I try to install The text processing extension, I always get the following error:
An error occurred while collecting items to be installed
session context was:(profile=KNIMEProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Problems downloading artifact: osgi.bundle,uk.ac.cam.ch.wwmm.oscar.4-recogniser-core,4.2.2.
MD5 hash is not as expected. Expected: d67f7e2ff75e146994de70ce0e164dbc and found bcb67190aa754da11b977e5876817032.
Which KNIME version are you running? Can you install any other extension? How do you try to install it - File --> Install KNIME Extensions or some other way?