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Werk #7777: Fix problem in legacy WATO plugin conversion

Component Setup
Title Fix problem in legacy WATO plugin conversion
Date Jun 11, 2019
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
1.6.0b2 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

When using 3rd party extensions that register WATO rulesets in the pre 1.6 logic (by using thre register_rule()) method, this may result in an error like this on the package management page TypeError: type() argument 1 must be string, not unicode.

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