r - Cannot write igraph object to file (forbidden control character error) -


when trying write igraph object file, receive following error:

error in .call("r_igraph_write_graph_graphml", graph, file, as.logical(prefixattr), : @ foreign-graphml.c:1236 : forbidden control character 0x08 found in igraph_i_xml_escape, invalid value

i using basic syntax writing igraph objects file in graphml format:

write.graph(mygraphobject,"graph_object_to_file.graphml",format="graphml")

i have tried converting character vector attributes of graph utf-8 using iconv function, has not worked far.

any ideas appreciated.

find character attribute contains character character code 0x08, , fix it. character stands backspace in ascii table, i'm pretty sure not meant there. also, character disallowed in xml 1.0 anyway, won't able save xml 1.0 file.

converting utf-8 won't work because utf-8 equivalent of 0x08 0x08.


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