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#
# Copyright 2007-2018 by the individuals mentioned in the source code history
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require(OpenMx)
foo <- mxModel('foo')
msg <- paste("The argument to the",
"'$' or '[' operator applied on a MxModel",
"object must be a single character string")
omxCheckError(foo[[1]], msg)
omxCheckError(foo[[TRUE]], msg)
suppressWarnings(omxCheckIdentical(foo[[NULL]], NULL))
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